Abstract Conductive polymers or, intrinsically conducting polymers (ICPs) are organic polymers that can have metallic conductivity or semiconductivity via conjugation and co-doping. Polypyrrole (PPy) as a kind of heterocyclic conjugated conductive polymers is considered to be the most prospective electric conductive polymer due to its relatively high conductivity, stability, and other characteristics. Recently, PPy /magnetic nanoparticles composite materials have become a research hotspot, for its
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Chapter I Introduction Background of the Study Talbos ng capote or a Sweet Potato Tops is one of those vegetables planted in many backyards. It is easily grown and does not require special maintenance or fertilizers to grow and is a good alternative to rice. The leafy part of the Camote tops plant is familiarly known as the Camote tops or talbos ng Camote in Tagalong. Capote leaves are usually used as vegetables in some traditional Filipino cuisines. The antioxidants present in a Capote plant
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Carbon Fibre Carbon fibre is sometimes known as graphite fibre, it is a strong, stiff, lightweight material that has the potential to replace steel and is popularly used in specialized, high-performance products like aircrafts, race cars and sporting equipment. Carbon fibre was first invented near Cleveland, Ohio, in 1958. It wasn’t until a new manufacturing process was developed at a British research centre in 1963 that carbon fibres strength potential was realized. Current methods for manufacturing
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38 37 CHAPTER 1 INTRODUCTION 1.1 Motivation Materials with small grain sizes have been the focus of attention for scientists and engineers since it has been proved by the work of Hall [Hall51] and Petch [Pet53] that strength increases as we decrease the grain size of the material. This finer grain size also helps in achieving superplastic deformation at higher strain rates and improves the fracture toughness of the material. Some of the traditional methods involving mechanical processes lead to
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used to designate fiber optic cable. Some of the products shown in the following pages are: • Connectors • Fiber optic test scope • Cables • Cable tester • Mount box • Punch-down block • Wall plates • Fiber patch panel • Jacks • Telephone installation • Face plates • Fiber optic breakout box • Cable strippers • Wiring closet • Connectorizing kits • Tractor-mounted unspooler FIBER OPTIC PATCH CABLE with MT-RJ connectors FIBER OPTIC PATCH CABLE
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11. Are there different types of side emitting fibers? Answer- Nowadays several types of side emitting fibers are marketed. The most common are: Solid core optics Multi-stranded optics 12. What are solid core fibers? Answer- These optics are cylinders made of diverse polymers and encased on a transparent sheath or tube. As a standard are manufactured in different gauges or calibers from 3 to 25 or more millimeters in diameter. 13. What are multi-stranded optics? Answer- Multi-stranded optics
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Before you can begin to design a fiber optic cable design, one needs to establish with the user or network owner where the network will be built and what communications signals it will carry. (LANs or Local area network)And security systems use structure cabling systems built around well-defined industry Standards. Many campus carry backbone network used in industrial complexes or Institutions uses as long as 500 m or more cabling requiring optical fiber. Telephone networks are mainly outside
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Stripper (the wire kind), wire cutter, cable crimper 2. What type of fiber-optic tester should you purchase to make sure the fiber-optic cable was installed without any fault and that enough light is being transmitted through the fiber, and what are the three key attributes to know before you purchase a tester? A. You want the tester to have the capability for correct fiber connectors, support the correct type of fiber (single vs. multi mode) and test appropriate wavelength. You should purchase
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Once a fiber optic cable plant, network, system or link is installed, it needs to be tested for four reasons: to insure the fiber optic cable plant was properly installed to specified industry standards. to insure the equipment intended for use on the cable plant will operate properly on the cabling to insure the communications equipment is working to specifications to document the cable plant and network for reference in case of future problems Tools and Test Equipment Needed The following tools
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Notes What is the speed of light- 186000miles a second or 700 million miles an hours?How fast dose sound travel.-340mdHow fast dose sound travel in water -33502mph | Cabling Notes 6/20/12 Name three rules of Data cabling 1. Networks never get smaller or less complicated. 2. Don’t scrimp on installation cost. Quality components and cable must be installed, No poor workmanship allowed. 3. Plan for higher –speeds technologies than are commonly available today. Just because
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