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 DATA WAREHOUSING SYSTEM - A CASE STUDY

 A data warehouse is a system which is used for storing a large accumulated data from a wide range of sources within  a company or an industry which is used us to guide us how to manage a decision. It is also known as an enterprise data warehouse which is generally used for broadcasting and for the data analysis. Data Warehouse is a central archive of unified data from different contrasting authority. Data Warehouse provides the prevailing and historical data to store the data which is used for the creation of the detailed report which is then used for the best knowledge of the workers through the company or an enterprise. It provides a copy of information from transaction systems and maintains the data even when the source transaction systems don't have it. There is a common data model which is provided by data warehouse for the storage of all the data regardless of the data's source. 

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Android kitkat OS

Android is Linux based mobile OS which is being used by popular smart phone brand like Samsung ,LG ,HTC , sony , xperia and many other. Kitkat OS is 4.4 version of this android which was released on October 31,2013. There is a detailed feature of all android invented today starting from the android 1.0 to android 4.4 ( kitkat ) . The feature of kitkat are wireless printing capability ,bluetooth message access profile support, browser text wrap is disabled ,futher security enhancements and bug fixes, wifi and mobile data activity indicators are moved to quick settings.

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5G mobile wireless technology

In this research paper, an attempt to review the existing generations of mobile technology in terms of their features, performance, advantages and disadvantages has been made. We will also discuss the evolution and development of different generations of mobile technology along with their importance and advantages of each generation. In this paper, comparison of 5G will also be done with all other generations from 1G to 4G including their important characteristics, advantages and disadvantages. Then later in this paper, requirement of 5G technology, 5G networks and 5G Mobile Network Architecture will be discussed. In the end all the features of 5G technology, its advantages over other generations and applications will be included and some future scope ( beyond 5g) will be proposed. The features 5G would have are high data rates and coverage at cell edge, less consumption of battery, 1Gbps data rate Better security ,IPv6 ( Internet Protocol Version6) ,Wireless world with no zone issues and limited access, WWWW – World Wide Wireless Web.
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3G VS WIFI

In this paper main area of networking compares two technologies for delivering broadband wireless Internet access services : "3G" vs. "Wi-Fi". 3G refers to the collection of 3r generation cellular technologies that are designed to allow cellular operators to offer integrated and high speed data and voice services over cellular network. Wi-Fi refers to the 802.11b wireless Ethernet standard that was designed to support wireless LANs. Although both the technologies are very different from each other they are both intended to provide broadband wireless internet access to portable devices. The characterstics of 3G and WiFi are availabity that we can see that 3G is available 90% of the time and Wi-Fi is available 12% of the time. The availability of Wi-Fi is an order of magnitude poorer than 3G. And the performance i.e The Wi-Fi loss rate performance is also poorer compared to 3G.Therefore leveraging Wi-Fi to augment 3G may in ever performance penalties.
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Solar Cell ijirmw

Solar cell is a p-n junction diode which converts solar energy into electrical energy. It is a solar converter and is simply a photo diode operated at zero bias voltage Photovoltaic literally means light- electricity. A brief idea about its construction is that it consists a p-n junction diode generally made of Ge and Si. It is constructed with many other semiconducting materials like gallium arsenide (GaAs), indium arsenide (InAs) and cadium arsenide (CdAs). The p-n so formed is packed in a can with glass window on the top so that light may fall upon P and N type materials. The thickness of the P-region is kept very small so that electrons generated in this region can diffuse to the junction before recombination takes place. Thickness of N-region is also kept small to allow holes generated near the surface to diffuse to the junction . A nickel plated ring is provided around the P-layer which acts as the positive output terminal. A metal contact at the bottom serves as a negative output terminal. In this paper, the working of solar cell is discussed .When light is allowed to incident on a P-N junction diode ,photons collide with valence electrons and impart then sufficient energy enabling them to leave parent atoms .
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network security

Network Security is the process of taking physical and software preventative measures to protect the networking infrastructure from unauthorized access, misuse, malfunction, modification, destruction, or improper disclosure, thereby creating a secure platform for computers, users and programs to perform their permitted critical functions within a secure environment. Network security consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security covers a variety of computer networks, both public and private, that are used in everyday jobs conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access. It does as its title explains: It secures the network, as well as protecting and overseeing operations being done.
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multiplexing

Multiplexing is the transmission of information from more than one source to more than one destination over the same transmission medium. Medium may be the optical fibre, air, coaxial cable etc. Due to multiplexing it is possible to increase the number of communication channels so that more information can be transmitted . Its has large number of different input signals. But has only one output .At the receiver end of the communication link a demultiplexer is used to sort out the signal into their original form. Demultiplexing is a process which is exactly opposite to that of the multiplexing .The multiplexed signal is transmitted over a communication channel, which may be a physical transmission medium (e.g. a cable). A reverse process, known as demultiplexing, can extract the original channels on the receiver side.A device that performs the multiplexing is called a multiplexer (MUX), and a device that performs the reverse process is called a demultiplexer (DEMUX or DMX). The multiplexing can be classified into three types (i) time division ,(ii) frequency division , (iii)wave division .
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