Abstract: Wireless technologies have experienced an enormous growth in the last decades. The wireless personal area networks (WPANs) and wireless local area networks (WPANs) are heterogeneous networks which are used in different applications. Two networks‚ called Wifi (IEEE 802.11 WLAN) and ZigBee (IEEE 802.15.4 WPAN)‚ which operates in 2.4 GHz frequency. Spectrum sharing is an effective technique which is used to enhance spectrum utilization. However the coexistence and Interoperability is a critical
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Chapter I INTRODUCTION A clothesline or washing line is a piece of rope or wire that people use to hang wet clothes to dry. [Merriam Webster] It may any type of rope‚ string‚ cord‚ or twine that has been stretched between two points generally outside‚ above the level of the ground. Clothing that have been washed is hung along the line to dry‚ using clothes pegs or clothespins. Washing lines are attached either from a post or a wall‚ and are frequently located in back gardens‚ or on balconies. Longer
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Earthquake will surprise you tomorrow‚ next next day‚ next week‚ next month or next year are you prepared? Or much better‚ how prepared you are? II.ACCOMPLISHMENTS 16th of July 2013 around 8:15 a.m when a long bell heard as a signal for an earthquake drill’s pre-arranged and while the bell was ringing the students ducked‚ covered their head below the chair with a book handle by the students on the top of their head. Until‚ the bell stop to ring; it was second period so that‚
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evolved from a stage when signs‚ drum beats and semaphores were used for long distance communication to a stage when electrical‚ radio and electro-optical signals are being used. Optical signals produced by laser sources and carried by ultra-pure glass fibers are recent additions to the field. Telecommunication networks carry information signals among entries which are geographically far apart. An entity maybe a computer‚ a human being‚ a facsimile machine‚ a teleprinter‚ a data terminal‚ and so on
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References: Fabian‚ K. (2014‚ February 21). eCommerce software review. In Top ten reviews. Retrieved March 19‚ 2014‚ from http://ecommerce-software-review.toptenreviews.com/ Hawkins‚ L. (2010‚ June 14). For busy Volusion‚ e-business is good. The Austin American-Statesman. Retrieved March 19‚ 2014‚ from Lexis Nexis. McMahan‚ T.‚ & Jones‚ D. (2011). Starting an online store made easy and ’really sexy ’; E-commerce. National Post. Retrieved March 19‚ 2014‚ from
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MEDIUM ACCESS CONTROL PERFORMANCE IN SATELLITE COMMUNICATION ABSTRACT MAC protocols are designed to coordinate the transmission of packets‚ retransmission of damaged packets‚ and resolution of collisions among stations during a contention period . The MAC protocols include fixed assignment protocol‚ demand assignment protocol‚ random access protocol‚ reservation protocol‚ hybrid of reservation protocol and random access protocols and adaptive protocols. Satellite communication systems have
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the offenders are severely punished. The second cause of accident is due to careless crossing in busy roads. While crossing one must look to the right and left for moving vehicles and then cross. Where there are Zebra crossings on the road for the pedestrians to cross‚ one should cross along them. One should keep to the margin of the road while walking and the vehicles must keep to their lanes in busy streets. In the case of accidents involving vehicles there are many causes. One is trying to overtake
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noise component into the quantised signal. Derive an equation for the mean-squared quantisation error in terms of the quantization interval ‘a’. ii) Hence show that the peak signal-to-quantisation noise ratio (SQNR) is SQNR = ( 6n + 4.8 ) dB Where 2 n is the number of quantisation levels. b)i) Linear quantisation is used prior to binary PCM encoding of an analogue baseband signal which has a uniform probability density function. The signal-to-quantisation noise ratio must be
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grow with the addition of John Quincy in 1767‚ Susanna in 1768‚ Charles in 1770‚ and Thomas Boylston in 1772. Sadly‚ Susanna died as a toddler and later the family suffered another tragedy when Abigail delivered a stillborn daughter in 1777. With a busy law practice‚ her husband spent a lot of time away from home. This situation only worsened as John Adams became an active member of the American Revolution and the Revolutionary War. As a result‚ the couple spent a lot of time apart. She was also left
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USES OF RECORDER IN MEDICAL FIELD Aditya Shakkarwar Roll no.-B44 Registration No.: 11110103 4th Sem‚ Department of ECE Lovely Professional University‚ Punjab adityashakkarwar@gmail.com Abstract- It is often necessary to have a permanent record or the state of a phenomenon being investigated .in necessary to monitor continuously the condition state or value of the process variables such as flow‚ force‚ pressure‚ temperature‚ current‚ voltage‚ electrical power etc. INTRODUCTION A recorder thus
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