Rezistența lichidă neegalată a cartilajului, care este de aproximativ 80% apă, rezistă câtorva dintre forțele cele mai dure pe corpul nostru
Noul hidrogel pe bază de Kevlar recreează magia cartilajului prin combinarea unei rețele de nanofibre dure de la Kevlar – fibrele „aramide” cele mai cunoscute pentru fabricarea vestelor antiglonț – cu un material utilizat în mod obișnuit în înlocuirea cartilajelor hidrogel, numit alcool polivinilic PVA.”Compozite biomimetice bogate în apă cu rețea nanofiberă abiotică auto-organizatoare” ). „Înțelegerea cartilajului înțelege modul în care formele de viață pot combina proprietăți care sunt uneori de neconceput împreună.”
| Posted: Nov 15, 2017 | |
Kevlar-based artificial cartilage mimics the magic of the real thing(Nanowerk News) The unparalleled liquid strength of cartilage, which is about 80 percent water, withstands some of the toughest forces on our bodies. |
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| Synthetic materials couldn’t match it – until „Kevlartilage” was developed by researchers at the University of Michigan and Jiangnan University. | |
| „We know that we consist mostly of water – all life does – and yet our bodies have a lot of structural stability,” said Nicholas Kotov, the Joseph B. and Florence V. Cejka Professor of Engineering at U-M, who led the study (Advanced Materials, „Water-rich biomimetic composites with abiotic self-organizing nanofiber network”). „Understanding cartilage is understanding how life .forms can combine properties that are sometimes unthinkable together.” | |
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| Like natural cartilage, the artificial cartilage withstands stresses by releasing water and can later recover by absorbing water. (Image: Joseph Xu) | |
| Many people with joint injuries would benefit from a good replacement for cartilage, such as the 850,000 patients in the U.S. who undergo surgeries removing or replacing cartilage in the knee. | |
| While other varieties of synthetic cartilage are already undergoing clinical trials, these materials fall into two camps that choose between cartilage attributes, unable to achieve that unlikely combination of strength and water content. | |
| The other synthetic materials that mimic the physical properties of cartilage don’t contain enough water to transport the nutrients that cells need to thrive, Kotov said. | |
| Meanwhile, hydrogels – which incorporate water into a network of long, flexible molecules – can be designed with enough water to support the growth of the chondrocytes cells that build up natural cartilage. Yet those hydrogels aren’t especially strong. They tear under strains a fraction of what cartilage can handle. | |
| The new Kevlar-based hydrogel recreates the magic of cartilage by combining a network of tough nanofibers from Kevlar–the „aramid” fibers best known for making bulletproof vests–with a material commonly used in hydrogel cartilage replacements, called polyvinyl alcohol, or PVA. | |
| In natural cartilage, the network of proteins and other biomolecules gets its strength by resisting the flow of water among its chambers. The pressure from the water reconfigures the network, enabling it to deform without breaking. Water is released in the process, and the network recovers by absorbing water later. | |
| This mechanism enables high impact joints, such as knees, to stand up to punishing forces. Running repeatedly pounds the cartilage between the bones, forcing water out and making the cartilage more pliable as a result. Then, when the runner rests, the cartilage absorbs water so that it provides strong resistance to compression again. | |
| The synthetic cartilage boasts the same mechanism, releasing water under stress and later recovering by absorbing water like a sponge. The aramid nanofibers build the framework of the material, while the PVA traps water inside the network when the material is exposed to stretching or compression. Even versions of the material that were 92 percent water were comparable in strength to cartilage, with the 70-percent version achieving the resilience of rubber. | |
| As the aramid nanofibers and PVA don’t harm adjacent cells, Kotov anticipates that this synthetic cartilage may be a suitable implant for some situations, such as the deeper parts of the knee. He also wonders whether chondrocytes might be able to take up residence inside the synthetic network to produce a hybrid cartilage. | |
| But his potential applications are not limited to cartilage. He suspects that similar networks, with different proportions of aramid nanofibers, PVA and water, may be able to stand in for other soft tissues. | |
| „We have a lot of membranes in the body that require the same properties. I would like to evaluate the space,” Kotov said. „I will talk to doctors about where the acute need is and where this intersection of the properties will allow us to make best headway and biggest impact.” | |
| Kotov is a member of the Biointerfaces Institute, which provides shared space for researchers from U-M’s engineering and medical schools. He is also a professor of chemical engineering, materials science and engineering, and macromolecular science and engineering. |
| Source: University of Michigan |
Posibilitatea unui atac chimic într-un centru urban central a accelerat eforturile Departamentului pentru Securitate Internă al SUA de a dezvolta mai multe platforme de alertă de securitate
Membranele cu oxid de grafen, dezvoltate de Institutul Național de Graphene, au atras atenția pe scară largă asupra aplicațiilor de filtrare a apei și de desalinizare, oferind o soluție potențială pentru deficitul de apă.
Prin utilizarea membranelor ultra-subțiri, acesta este primul experiment clar pentru a arăta cum pot fi filtrați alți solvenți, demonstrând că există potențial pentru nanofiltrarea cu solvenți organici.
Graphene – primul material bidimensional din lume este cunoscut pentru superlativele sale versatilate, poate fi hidrofob și hidrofil, mai puternic decât oțel, flexibil, flexibil și de un milion de ori mai subțire decât părul uman.
| Posted: Nov 13, 2017 | |
Graphene water filter turns whisky clear(Nanowerk News) Previously graphene-oxide membranes were shown to be completely impermeable to all solvents except for water. However, a study published in Nature Materials(„Ultrathin graphene-based membrane with precise molecular sieving and ultrafast solvent permeation”), now shows that we can tailor the molecules that pass through these membranes by simply making them ultrathin. |
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| The research team led by Professor Rahul Nair at the National Graphene Institute and School of Chemical Engineering and Analytical Science at The University of Manchester tailored this membrane to allow all solvents to pass through but without compromising it’s ability to sieve out the smallest of particles. | |
| In the newly developed ultrathin membranes, graphene-oxide sheets are assembled in such a way that pinholes formed during the assembly are interconnected by graphene nanochannels, which produces an atomic-scale sieve allowing the large flow of solvents through the membrane. | |
| This new research allows for expansion in the applications of graphene based membranes from sea water desalination to organic solvent nanofiltration (OSN). Unlike sea water desalination, which separate salts from water, OSN technology separates charged or uncharged organic compounds from an organic solvent. | |
| As an example, Manchester scientists demonstrated that graphene-oxide membranes can be designed to completely remove various organic dyes as small as a nanometre dissolved in methanol. | |
| Prof. Nair said, “Just for a fun, we even filtered whisky and cognac through the graphene-oxide membrane. The membrane allowed the alcohol to pass through but removed the larger molecules, which gives the amber colour. The clear whisky smells similar to the original whisky but we are not allowed to drink it in the lab, however it was a funny Friday night experiment!” | |
| The newly developed membranes not only filter out small molecules but it boosts the filtration efficiency by increasing the solvent flow rate. | |
| Prof. Nair added “Chemical separation is all about energy, various chemical separation processes consume about half of industrial energy useage. Any new efficient separation process will minimize the consumption of energy, which is in high demand now. By 2030, the world is projected to consume 60% more energy than today.” | |
| Dr. Su, who led the experiment added “The developed membranes are not only useful for filtering alcohol, but the precise sieve size and high flux open new opportunity to separate molecules from different organic solvents for chemical and pharmaceutical industries. This development is particularly important because most of the existing polymer-based membranes are unstable in organic solvents whereas the developed graphene-oxide membrane is highly stable.” | |
| Graphene-oxide membranes developed at the National Graphene Institute have attracted widespread attention for water filtration and desalination applications, providing a potential solution to the water scarcity. | |
| By using ultra-thin membranes, this is the first clear-cut experiment to show how other solvents can be filtered out, proving that there is potential for organic solvent nanofiltration. | |
| Graphene- the world’s first two-dimensional material is known for its versatile superlatives, it can be both hydrophobic and hydrophilic, stronger than steel, flexible, bendable and one million times thinner than a human hair. | |
| This research has changed the perception of what graphene-oxide membranes are capable of and how we can use them. By being able to design these membranes to filter specific molecules or solvents, it opens up new potential uses that have previously not been explored. |
| Source: University of Manchester |
a unei clase de materiale denumite cadre organice metalice – MOF. MOF-urile sunt folosite pentru detectarea, purificarea și depozitarea gazelor și ar putea contribui la rezolvarea unor provocări energetice, de mediu și farmaceutice cele mai provocatoare din lume – pot chiar trage molecule de apă direct din aer pentru a asigura scutirea de secetă.MOF sunt cristale poroase la scară microscopică, proiectate din ioni metalici legați împreună de molecule organice numite liganzi. Deși sunt mici, au o abilitate imensă de absorbție.
| Posted: Nov 13, 2017 | |
A new spin on old technique to engineer better absorptive materials(Nanowerk News) A team of University of Illinois bioengineers has taken a new look at an old tool to help characterize a class of materials called metal organic frameworks – MOFs for short. MOFs are used to detect, purify and store gases, and could help solve some of the world’s most challenging energy, environmental and pharmaceutical challenges – they can even pull water molecules straight from the air to provide relief from drought. |
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| The research team, led by bioengineering professor Rohit Bhargava, is using infrared chemical imaging to examine and optimize the structure of MOFs. Although around for more than a decade, IR imaging is greatly underutilized in materials analysis. The researchers found that with a few modifications to improve the speed of analysis, it is the perfect tool for this application. Their findings are published in the Journal of Physical Chemistry Letters („Mapping solvation environments in porous metal organic frameworks with infrared chemical imaging”). | |
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| University of Illinois bioengineers, from left, Ayanjeet Ghosh, professor Rohit Bhargava, Prabuddha Mukherjee and Sanghamitra Deb are using an updated infrared imaging technique to better examine and optimize a group of materials that could help solve some of the world’s most challenging energy, environmental and pharmaceutical challenges. | |
| MOFs are microscopic-scale porous crystals engineered from metal ions bound together by organic molecules called ligands. Although they are tiny, they have an immense absorptive ability. | |
| „The pores allow the MOFs to work like tiny sponges that can soak up chemicals such as pharmaceuticals and gases,” said Sanghamitra Deb, a postdoctoral researcher at the Beckman Institute for Advanced Science and Technology at the U. of I. | |
| „The precise structure and chemistry of MOFs greatly influence their functionality,” said Prabuddha Mukherjee, a Beckman Institute research scientist. „Therefore, detailed characterization is essential in determining their best use.” | |
| The traditional methods used in materials science analysis, like high-powered electron microscopy and spectroscopy, do not combine chemical insights with the spatial resolution of IR imaging, the researchers said, so they can only provide average chemical measurements. | |
| MOFs form by crystallizing out of a solution, and there is no way of fully controlling their structure or chemistry. „This lack of control leaves a lot of room for defects to form, and the traditional methods for characterization only tell us that there is a defect but cannot pinpoint the specific location,” Mukherjee said. | |
| „IR imaging allows us to see the chemistry and the structure in one shot,” said Ayanjeet Ghosh, a postdoctoral researcher with the Beckman Institute. „We can resolve structures down to a few microns and determine their chemical composition over a few micron areas, understand how and why the spectra change as a function of space, and do it with a single analysis.” | |
| IR imaging also offers a unique scale range to work in, the researchers said. | |
| „We do not need to see down to the atomic scale, like many high-powered electron microscopy methods offer,” Deb said. „At that scale, it would take a very long time to scan devices made with MOFs, which are typically about a millimeter squared in size.” | |
| Finally, many of the other traditional techniques are destructive, meaning that once analyzed with one method, the sample cannot be examined with any additional tools. „We may be able to spot an aberration in chemistry via spectroscopy, but we don’t have the opportunity to see where the defect actually exists using another method because the sample is now gone,” Ghosh said. „With IR imaging, we can do both at the same time.” | |
| „This unique use of an older technique, but with new instrumentation, allows us to quickly determine the quality and best application for specific MOFs in a nondestructive way – something no other group has been able to do,” Mukherjee said. | |
| The group envisions this technique being used with other devices made under similar conditions, as well as uses outside of the materials science realm. |
| Source: By Lois Yoksoulian, University of Illinois at Urbana-Champaign |
Prin organizarea de pigmenti pe un schelet ADN, o echipa de cercetatori condusa de MIT a proiectat un material de recoltare a luminii care imita foarte mult structura structurilor fotosintetice care apar in mod natural.
Cercetătorii au arătat că materialul lor sintetic poate absorbi lumina și își poate transfera eficient energia de-a lungul căilor controlate precis. Acest tip de structură ar putea fi încorporat în materiale precum sticlă sau textile, ceea ce le va permite să recolteze sau să controleze în alt mod energia care intră în lumina soareluiCercetătorii consideră că aceste structuri sintetice ar putea fi integrate în materiale de tip 2-D și 3-D, cum ar fi sticla sau textilele, oferind acestor materiale abilitatea de a absorbi lumina soarelui și de a o transforma în alte forme de energie, cum ar fi electricitatea, folosiți energia. Structurile ar putea, de asemenea, să formeze o nouă bază pentru computerele cuantice, implementate la scară nanometrică, utilizând circuite excitonice ca porți logice cuantic
| Posted: Nov 13, 2017 | |
Synthetic circuits can harvest light energy(Nanowerk News) By organizing pigments on a DNA scaffold, an MIT-led team of researchers has designed a light-harvesting material that closely mimics the structure of naturally occurring photosynthetic structures. |
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| The researchers showed that their synthetic material can absorb light and efficiently transfer its energy along precisely controlled pathways. This type of structure could be incorporated into materials such as glass or textiles, enabling them to harvest or otherwise control incoming energy from sunlight, says Mark Bathe, an associate professor of biological engineering at MIT. | |
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| By organizing pigments on a DNA scaffold, an MIT-led team of researchers has designed a light-harvesting material that closely mimics the structure of naturally occurring photosynthetic structures. (Image: MIT) | |
| “This is the first demonstration of a purely synthetic mimic of a natural light-harvesting circuit that consists of densely packed clusters of dyes that are precisely organized spatially at the nanometer scale, as found in bacterial systems,” Bathe says. | |
| Bathe is one of the senior authors of the new study, along with Alan Aspuru-Guzik, a professor of chemistry and chemical biology at Harvard University, and Hao Yan, a professor of chemistry and biochemistry at Arizona State University. Lead authors of the paper, which appears in Nature Materials („Programmed coherent coupling in a synthetic DNA-based excitonic circuit”), are former MIT postdoc Etienne Boulais, Harvard graduate student Nicolas Sawaya, and MIT postdoc Rémi Veneziano. | |
Capturing light |
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| Over billions of years, plants and photosynthetic bacteria have evolved efficient cellular structures for harvesting energy from the sun. This process requires capturing photons (packets of light energy) and converting them into excitons — a special type of quasiparticle that can carry energy. Energy from these excitons is then passed to other molecules at a complex of protein and pigments known as a reaction center, and eventually used by the plant to build sugar molecules. | |
| While scientists have developed reliable techniques for carrying electrons (such as semiconductors) and photons (fiber optics), coming up with ways to control excitons has proven more challenging. | |
| Four years ago, Bathe, Aspuru-Guzik, and Yan began working on synthetic structures that could mimic natural light-harvesting assemblies. These assemblies, usually found in cell organelles called chloroplasts, have an intricate structure that efficiently captures and transports solar energy at the scale of nanometers. | |
| “What’s really amazing about photosynthetic light-harvesting is how well it meets the organism’s needs,” says Gabriela Schlau-Cohen, an MIT assistant professor of chemistry who is also an author of the paper. “When it is required, every absorbed photon can migrate through the network of proteins that surrounds the reaction center, to generate electricity.” | |
| The researchers set out to mimic these structures by attaching light-harvesting pigments to study scaffolds made of DNA. Over the past several years, Bathe’s lab has devised new ways to program DNA to fold in particular shapes, and last year Bathe and his colleagues created a new computer-programming tool that automates the process of designing DNA scaffolds of nearly any shape. | |
| For this study, the researchers wanted to use DNA scaffolds to spatially organize densely packed clusters of pigments similar to those found in nature. Boulais found a 1977 paper that showed that a synthetic pigment called pseudoisocyanine (PIC) aggregates onto specific sequences of naturally occurring DNA to form the type of structure the researchers were seeking, called a J-aggregate. However, because this approach used naturally occurring DNA, there was no way to control the spacing, size, or 3-D spatial organization of the clusters. | |
| Veneziano tested the researchers’ ability to template these J-aggregates into discrete clusters with distinct 2-D organizations using synthetic DNA, and Boulais and Sawaya worked to computationally design customizable, synthetic DNA scaffolds that organize these aggregates into circuits that absorb photons and transport the resulting excitons along a predictable path. By programming specific DNA sequences, the researchers can control the precise location and density of the clusters of dye molecules, which sit on a rigid, double-stranded DNA scaffold. They computationally modeled how factors such as the number of dye molecules, their orientation, and the distances between them would affect the efficiency of the resulting circuits, analyzing many versions of the circuits for their efficiency of energy transfer. | |
| “Photosynthetic organisms organize their light-harvesting molecules precisely using a protein scaffold. Up to now, this kind of structural control has been difficult to realize in synthetic systems. It looks like DNA origami provides a means of mimicking many of the principles of photosynthetic light-harvesting complexes,” says Gregory Scholes, a professor of chemistry at Princeton University who was not involved in the study. | |
| Part of the ASU team, led by co-author Su Lin, performed a series of spectroscopic measurements to demonstrate that the designed DNA structures produced the desired J-aggregates, and to characterize their photophysical properties. Schlau-Cohen, who uses advanced spectroscopy techniques to analyze light-harvesting systems, both natural and synthetic, showed that these dense pigment assemblies were able to efficiently absorb light energy and transport it along specific pathways. | |
| “We demonstrated the ability to control the traffic patterns using J-aggregated dyes, not just how far the excitons can travel. That’s important because it offers versatility in designing such circuits for functional materials,” Bathe says. | |
| “Bottom-up design of excitonics systems has been a focused goal of our Energy Frontiers Research Center (EFRC). I am glad to see an important stepping stone toward demonstrating bottom-up control of exciton flow,” Aspuru-Guzik says. He adds that “multidisciplinary research that tightly couples synthesis, theory, and characterization was required to get to this point.” | |
New materials |
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| The researchers believe that these synthetic structures could be integrated into 2-D and 3-D materials such as glass or textiles, giving those materials the ability to absorb sunlight and convert it into other forms of energy such as electricity, or to otherwise store or harness the energy. The structures might also form a new basis for quantum computers, implemented at the nanoscale, using excitonic circuits as quantum logic gates. | |
| The researchers now plan to explore ways to make these synthetic light-harvesting systems even better, including looking for more efficient pigments, which may lie in the recently announced Max Weaver Dye Library at North Carolina State University, which houses 98,000 unique dyes. | |
| “There are still a lot of ways that we can imagine improving this,” Schlau-Cohen says. “We have the ability to control individual molecular parameters to explore the basic science questions of how can we transport energy efficiently in a disordered material.” Schlau-Cohen is also the senior author of a companion publication that will be published in the Journal of Physical Chemistry Letters next week. |
| Source: By Anne Trafton, MIT |
au descoperit noi proprietăți magnetice interesante ale unui tip de material cunoscut sub numele de ” cu gheață de spin quantum. „Aceste materiale prezintă proprietăți interesante, deoarece se comportă ca „magneți frustrați” – sisteme care se pot regla în diferite stări magnetice datorită geometriei lor speciale. O proprietate importantă a acestor materiale este aceea că au monopoluri particulare virtuale care sunt fie nordice sau sudice, dar nu ca niște magneți tipici, care au în mod invariabil atât un pol de nord cât și un sud limitat împreună.
| Posted: Nov 13, 2017 | |
Monopole current offers way to control magnets(Nanowerk News) In work published in Physical Review Letters („Quantum spin ice under a [111] magnetic field: from pyrochlore to kagomé”), scientists from RIKEN in Japan have discovered interesting new magnetic properties of a type of materials known as “quantum spin ice.” |
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| These materials demonstrate interesting properties as they behave as “frustrated magnets”—systems that can settle into various magnetic states because of their special geometry. One important property of these materials is that they have virtual monopoles—particles that are either north or south but not like typical magnets, which invariably have both a north and south pole confined together. | |
| Using numerical simulations, the group showed how a magnetic field could be used to control the properties of north and south poles, which are fractionalized from magnetic moments of electrons, on a frustrated magnet called a quantum spin ice. | |
| The group first proposed a model for quantum spin ice—spin ice based on quantum properties—in 2010 in order to describe the low-energy magnetic properties of magnetic rare-earth pyrochlores—a type of mineral that show interesting physical properties. | |
| In 2012, experiments showed that this model was valid. This system includes a quantum spin liquid state where spins—the property of electrons that lead to magnetic properties—are prevented from ordering and freezing by zero-point motion, a type of motion allowed even at zero temperature under quantum mechanics, of their monopoles. Since monopole charges are subject to a conservation law, the motion of north and south poles directly affects the direction of magnetic moments in the system. | |
| In addition, electric charges are not carried by these monopoles, and thus the monopole current is not accompanied by an electric current that would lead to a large energy loss through Joule heat. “Because of this,” says Shigeki Onoda, the leader of the group, “monopole current offers a potentially efficient way of controlling magnets without loss.” | |
| Through this work, the researchers revealed that there are successive transitions from the quantum spin liquid state if a magnetic field is applied in a special direction along which kagome-lattice layers and triangular-lattice layers are stacked one on top of the other. | |
| First, the magnetization of the system rises smoothly to a value two-third of the maximum value in the quantum spin liquid state, and then remains at that level in a finite range of the field strength, which is called the 2/3 magnetization plateau. In this plateau state, the zero-point motion of monopoles are spatially confined and localized, and thus this state cannot host a coherent monopole current. H | |
| owever, as the strength of the magnetic field is increased, the magnetization of the material eventually begins to rise again and concomitantly, the monopole charges become disproportionate and show a superfluidity. This is a magnetic analogue of a supersolid in helium 4, where the atoms show both a non-uniform spatial distribution and a superfluidity, which supports frictionless and thus dissipationless current, at extremely low temperature. The monopole supersolid phase survives until the magnetization saturates to the maximum value. | |
| According to Onoda, “Our work indicates that the conductivity associated with the monopole current can be substantially controlled by applying a magnetic field to quantum spin ice and that it is possible to host dissipationless monopole current in the monopole supersolid phase. Our findings may also open a novel route to the efficient control of magnetism for a range of potential applications such as memory devices.” |
| Source: RIKEN |
cercetatorii au realizat un progres in manipularea luminii pentru a face un obiect, cum ar fi un cip optic, invizibil.schema de invizibilitate. (© Nature)
Un cip de operare poate fi o extensie a tehnologiilor de bază cum ar fi vopseaua întunecată absorbantă radar utilizată pe avioane stealth, camuflajul local optic, răcirea suprafeței pentru a minimiza emisiile electromagnetice în infraroșu sau împrăștierea undei electromagnetice.
| Posted: Nov 13, 2017 | |
Researchers camouflage an optical chip rendering it invisible(Nanowerk News) Ben-Gurion University of the Negev (BGU) researchers have achieved a breakthrough in manipulating light to render an object, such as an optical chip, invisible. |
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| According to the recent study published in Scientific Reports („Invisibility Cloaking Scheme by Evanescent Fields Distortion on Composite Plasmonic Waveguides with Si Nano-Spacer”), the researchers conceived a new method that deflects and scatters light away from a „cloaking” chip surface so it is not detected. | |
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| Illustration of the composite plasmonic waveguide structure and materials to study the invisibility cloaking scheme. (© Nature) | |
| An operational cloaking chip can be an extension of the basic technologies such as radar-absorbing dark paint used on stealth aircraft, local optical camouflage, surface cooling to minimize electromagnetic infrared emissions, or electromagnetic wave scattering. | |
| „These results open the door to new integrated photonic devices, harnessing electromagnetic fields of light at nanoscale for a variety of applications from on-chip optical devices to all-optical processing,” says Dr. Alina Karabchevsky, head of BGU’s Light-on-a-Chip Group and a member of the BGU Unit of Electro-Optical Engineering and the Ilse Katz Institute for Nanoscale Science and Technology. „We showed that it is possible to bend the light around an object located on the cloak on an optical chip. The light does not interact with the object, thus resulting in the object’s invisibility.” | |
| The next step is for researchers to overcome the significant challenge of developing a prototype. |
| Source: Ben-Gurion University of the Negev |
Forțele Mare s-au îmbinat împreună;Sioen Ballistics ca partener de încredere;Veste balistice;Căști, scuturi și accesorii
Tehnica rachetelor fiind dezvoltată pentru a ataca sistemele americane de apărare antirachetă, cu încărcături nucleare
Un antreprenor sponsorizeaza universitati pentru studierea roboticii de transmisie video fără fir pentru utilizarea în aplicații militare ;Soluția se bazează pe capacitatea noastră dovedită de a dezvolta și livra soluții extrem de compacte, caracterizate prin robustețe, fiabilitate ridicată, calitate video excepțională și o gamă excepțională în condiții dificile
