Communication Networks Australia

Washing Lines – A Sight For Sore Eyes

Are you yearning for somewhere to dry your clothes? Today apartment dwellers often have difficulty finding a drying space. They are often stuck with residential rules and are unable to hang clothes out of buildings. A small communal drying green is often provided but security is on every ones mind. Where do you hang those expensive much loved designer items, the rhinestone studded jeans or the western style top? The indoor retractable washing line is often the answer. Giving some 70 feet of drying line it is available in a multi line version and is installed between walls – often in the bathroom, ideal over the bath to catch any drips.

The old fashioned washing lie is a sight to see. Sometimes seen in back gardens with old stretcher poles pushing the line up in to the air so the washing can catch the wind. The tedious task of separating clothes into drying types is over when you use a clothes line or airer. The airer accepts anything and dries everything according to their needs. Polyesters and cottons, silks and synthetics all on the same airer.

No need to worry about carbon footprint once as the clothes airer uses no energy. Visitors standing in your kitchen will comment presently on your clothes airer. Ideal for full washing loads or even for the quick washed and wrung out item. No need to make up a load. The big advantage of using a clothes airer is it eliminates use of a tumble dryer. The tumble dryer is one of the hungriest of domestic appliances. When you turn it on you turn up a hungry heater to full. It cannot tell when some clothes are dry; a sensor model can only tell when all are dry so many are baked in the process. The natural oils in the fibres of your clothes are dried reducing the strength and elasticity of the fibres.

The beating motion of the drum beats the fibres out of the clothes making them age quicker. Check the fluff filter to see all the colourful fibres being forcibly extracted from your much loved woollens.

Clothes airers simply treat clothes naturally. No baking, overheating, beating or fibre extraction. Clothes airers extend the life of your clothes – definitely a welcome sight.

About the Author

Jean Forsyth writes articles for airers4you. She is a housewife with a passion for all things environmentally friendly. To see a great range of airers click here.

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500m Bluetooth Interphone Headsets for Motorcycle Helmet (2pcs in one packaging, the price is for 2pcs) $100.55 Maximum talking range 500 meters between two riders, real two-way wireless communication speed. Up to 120KM working speed. Up to 7 hours talking time. Safe auto-receiving cell phone calls. Advanced A2DP & EDR bluetooth profile. Stereo music / audio function (transmits from A2DP enabled cellphone / Mp3 / GPS). Wind noise DSP cancellation. Water-resistance, all weather, friendly for gloves. 500mAh current Li-polymer battery ,Standby time: 100 hours. Charging time: 3 – 6 hours. It can connect with four Bluetooth devices: a Bluetooth enabled cell phone, two Bluetooth interphone ( two riders or one rider and one pillion), an audio source which with a built in or a external audio Bluetooth transmitter. It also offers a call rejecting function. -When income a cellphone call,you will hear the ring,immediately press the phone/play key within 1 seconds,it will reject the call. It is a multifunctional device for motorcyclists and skiers, it can be used: As a handsfree Bluetooth headset for cell phone calls; While out riding or snow skiing, the auto answer feature of the internal Bluetooth profile enables safe automatic Handsfree answering of the phone call automatically. As a two way wireless full duplex interphone between riders or between rider & pillion: -The maxiumu communication range over a high clear line of sight path can reach 500m/1640ft! (This maximum range is not guaranteed);-Typical effective range in city is approximately 300/950ft. Please note that actual range will depend on weather conditions, terrain, presence of obstacles, i.e? a large vehicle, buildings non line of sight etc. -Unlike a one-way walkie talkie, which is only half duplex i.e. it can not speak and listen simultaneously, it offers real-time talking like a normal telephone. As a wireless Bluetooth music receiver and speaker, it has EDR and A2DP profile, with EDR and A2DP profile it can offer another important function— listening to stereo music from A2DP enabled cellphone, MP3 or navigation audi

Applied Aspects of Optical Communication and LIDAR $159.95 Exploring the practical aspects of atmospheric optical communication and light detection and ranging (LIDAR), Applied Aspects of Optical Communication and LIDAR details the role of atmospheric structures in propagation phenomena that influence the transmission of optical signals through perturbed atmospheric communication channels. It examines numerous situations in over-the-terrain atmospheric communication channels, including the effects of natural phenomena and the corresponding features (turbulences and hydrometeors) on optical ray propagation. Bridging the gap between the parameters of optical communication links and signal information data streams, this concise reference addresses line-of-sight (LOS) as well as obstructive non-line-of-sight (NLOS) propagation conditions. It also:Details the main characteristics of optical communication channelsIntroduces the quasi-regular gaseous atmosphereDescribes numerous situations in the atmospheric communication channelExplains the main characteristics of optical communication channelsComplete with parameters for information data streams, the text also provides time-saving suggestions for determining which optical devices will work best for minimizing the deleterious effects of natural atmospheric phenomena. Whether you’re a researcher, an engineer, or student—this book provides you with the practical understanding required to use LIDAR to investigate all forms of atmospheric phenomena and to learn how to accurately predict primary parameters of atmospheric optical channels.

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Fundamentals of Mobile Wimax $86.36 Used – In these days, WiMAX (Worldwide Interoperability for Microwave Access) is an eminent technology that provides broadband and IP connectivity on “last mile” scenario. It offers both line of sight and non line of sight wireless communication. OFDMA uses the concept of cyclic prefix that adds additional bits at transmitter end. The receiver removes these additional bits in order to minimize the inter symbol interference (ISI), to improve the bit error rate and to reduce the power spectrum. Al

Fundamentals of Mobile Wimax $86.36 New – In these days, WiMAX (Worldwide Interoperability for Microwave Access) is an eminent technology that provides broadband and IP connectivity on “last mile” scenario. It offers both line of sight and non line of sight wireless communication. OFDMA uses the concept of cyclic prefix that adds additional bits at transmitter end. The receiver removes these additional bits in order to minimize the inter symbol interference (ISI), to improve the bit error rate and to reduce the power spectrum. All

Fundamentals of Mobile Wimax $55.51 Used – In these days, WiMAX (Worldwide Interoperability for Microwave Access) is an eminent technology that provides broadband and IP connectivity on “last mile” scenario. It offers both line of sight and non line of sight wireless communication. OFDMA uses the concept of cyclic prefix that adds additional bits at transmitter end. The receiver removes these additional bits in order to minimize the inter symbol interference (ISI), to improve the bit error rate and to reduce the power spectrum. Al

Microwave Transmission: Starwisp, Wireless Energy Transfer, British Telecom Microwave Network, Trans Canada Microwave $10.46 Purchase includes free access to book updates online and a free trial membership in the publisher’s book club where you can select from more than a million books without charge. Chapters: Starwisp, Wireless Energy Transfer, Microwave Transmission, British Telecom Microwave Network, Trans Canada Microwave. Excerpt: The British Telecom microwave network was a network of point-to-point microwave radio links in the United Kingdom, operated at first by the General Post Office , and subsequently by its successor BT plc . From the late 1950s to the 1980s it provided a large part of BT’s trunk communications capacity, and carried telephone, television and radar signals and digital data, both civil and military. Its use of line-of-sight microwave transmission was particularly important during the Cold War for its resilience against nuclear attack . It was rendered obsolete, at least for normal civilian purposes, by the installation of a national fibre optic communication network with considerably higher reliability and vastly greater capacity. BT remains one of the largest owners of transmission and microwave towers in the UK. The most famous of these is the BT Tower in London , which was the tallest building in the UK from its construction in the 1960s until the early 1980s, and a major node in the BT microwave network. Television links The earliest operational GPO microwave links were provided for 405-line BBC television. Experimental systems London to Birmingham pre-war In 1939 the Post Office placed a contract with EMI for an experiment in the relaying of television signals to Birmingham. In this case, the signals from Alexandra Palace were to be received at Dunstable and transmitted over a radio link to Sharmans Hill, Charwelton, some 40 miles distant towards Birmingham; thus carrying the signal two-thirds of the way from London to Birmingham. World War II intervened and this early experiment had to be abandoned. London to Castleton 195 MHz The GPO built in

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Modeling Vegetation Effects for Path Loss Prediction in Urban Areas $70.85 New – In densely populated urban areas wireless communication is predominantly line-of-sight(LOS). To cater for high data rates, high frequency bands are likely to be used. At such frequency bandswhen skin depth of vegetation becomes small as compared to its actual thickness, effects of vegetation on radiowave propagation cannot be neglected.This report explores the effect of vegetation on signal attenuation. A statistical approach is used to model the effective attenuation caused by randomly sc

Modeling Vegetation Effects for Path Loss Prediction in Urban Areas $45.9 Used – In densely populated urban areas wireless communication is predominantly line-of-sight(LOS). To cater for high data rates, high frequency bands are likely to be used. At such frequency bandswhen skin depth of vegetation becomes small as compared to its actual thickness, effects of vegetation on radiowave propagation cannot be neglected.This report explores the effect of vegetation on signal attenuation. A statistical approach is used to model the effective attenuation caused by randomly s

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Propagation Handbook for Wireless Communication System Design $174.86 Propagation data are fundamental to building efficient, robust, and economical communication systems, from satellite antennas to handheld telephones. Covering frequencies from .3 to 300 GHz, this handbook presents models that describe that data and make predictions for conditions that will affect operational systems. Topics include link margins for line-of-sight terrestrial systems, propagation within buildings, interference between systems, experiment design and calibration, prediction models for different environments and frequencies, Earth-space propagation effects, and attenuation prediction at different bands. Communications engineers around the world need this information readily at hand, and this is the first resource to offer it all within a single volume. OTI #1: 1025

Radio Noise Source $68.99 Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. High Quality Content by WIKIPEDIA articles! A radio noise source is a device that emits radio waves at a certain frequency, used to calibrate radio telescopes such that received data may be compared to a known value, as well as to find the focal point of a telescope soon after construction, so that the wave guide and front end may be properly located. Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are produced by lightning, or by astronomical objects. Artificially-generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earth’s atmosphere; long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight.

Radio Propagation and Adaptive Antennas for Wireless Communication Links: Terrestrial, Atmospheric and Ionospheric $75.28 An exhaustive exploration of radio propagation phenomena in a range of environmentsCovering the basics of wireless communication system design, Radio Propagation and Adaptive Antennas for Wireless Communication Links provides a comprehensive overview of the many different situations in the over-the-terrain, atmospheric, and ionospheric communication channels.For each channel, authors Blaunstein and Christodoulou explain the role of various obstructions on the corresponding propagation phenomena that influence the transmission of radio signals through such communication channels, both in line-of-sight (LOS) and non-line-of-sight (NLOS) propagation conditions along the radio path between the transmitter and the receiver antennas.Brimming with practical applications and real-world examples, Radio Propagation and Adaptive Antennas for Wireless Communication Links explores:Adaptive antennas at the link terminals, and how they can be used to minimize the deleterious effects of obstructionsRelevant topics in radio propagation in various media and their applications in smart communication networksMultipath phenomena, path loss, large-scale or slow fading, and short-scale or fast fadingFree-space propagation; propagation above the irregular terrain, in the inhomogeneous and stratified atmosphere and ionosphere; the reflection and diffraction by various obstructions, regularly or randomly distributed in an area of communicationWritten for practicing engineers working in communications, antennas, and propagation, Radio Propagation and Adaptive Antennas for Wireless Communication Links provides complete and thorough coverage of every topic related to the design of wireless communication systems.

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Wireless Location in Cdma Cellular Radio Systems $183 The tremendous growth of the wireless communications industry demands both the extension of certain landline services to wireless services as well as entirely new services that are unique to wireless systems. Many of these applications, such as Emergency-911 (E-911), fraud detection, location-sensitive billing, and Intelligent Transportation Systems (ITS), will, in fact, require the deployment of accurate wireless position location systems, particularly in the light of the 1996 FCC report and order which requires location accuracy to within 125 m by October, 2001.Wireless Location in CDMA Cellular Radio Systems investigates methods for wireless location in CDMA networks and analyses their performances. Techniques for measuring location parameters (AoAs, ToAs, etc.) are presented along with algorithms for calculating position from these parameters. Several impairments to accurate location are covered and analyzed including multipath propagation, non-line-of-sight propagation, and multiple-access interference. Many of the topics in this book are also applicable to FDMA- and TDMA-based communication networks.

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