Informatics Publishing Limited

K. Vidhya ¹, M. Rubika SelvaJothi ¹, V. Sujithra ¹, J. Ramya ¹

Affiliations
1 Sri Ramakrishna Engineering College, Coimbatore, Tamilnadu, IN

Abstract

This paper represents an end-to-end baseband model of the physical layer of a WiMAX network. MIMO-OFDM systems have been adopted in WiMAX which enable high data rate transmission over multipath fading channel. This model also illustrates adaptive modulation and coding over no fading, flat-fading and dispersive multipath fading channel whereby the simulation varies the data rate dynamically. The performance of WiMAX OFDM system physical layer in terms of BER and PER are evaluated using adaptive modulation technique in no fading, flat- fading and dispersive multipath fading channel. The WiMAX OFDM system is designed using MATLAB Simulink and the performances are evaluated. The simulation results show that maximum data rate and minimum values of BER and PER are obtained in 64QAM compared to other modulation techniques.

Keywords

Multipath Fading Channel, Adaptive Modulation, WiMAX, OFDM, BER, PER.

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J. Ramya ¹, M. Saravanan ²

Affiliations
1 Department of Computer Science and Engineering, K. Ramakrishnan College of Engineering, IN
2 Department of Computer Science and Engineering, Sri Ramakrishna College of Engineering, IN

Abstract

A system for private searching on streaming data, allows client to send the encrypted search query to the remote server. The server uses the encrypted query on a stream of documents and returns the matching documents to the client without revealing the features of the query. A novel technique for private searching on streaming data is proposed which is based on keyword frequency that is the number of times that a keyword appears in the document is required to be higher or lower than a given threshold. This form of query searching can help the client in locating more related documents. Using fully homomorphic encryption techniques, the server can perform search for retrieving the related documents even though the search query is in encrypted form. Our scheme provides number of vital benefits for the client. They provide provable secrecy for encryption, in the view that the untrusted server cannot gather any information about the plaintext. They also reinforce hidden queries, so that the client may ask the remote server to search for a secret word without revealing the word to the server.

Keywords

Homomorphic Encryption, Private Searching on Streaming Data, Trusted Security, Query Search, Efficient Retrieval.

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P. Indumathy ¹, J. Ramya ²

Affiliations
1 Department of Foods and Nutrition, Vellalar College for Women (Autonomous), Erode, Tamilnadu, IN
2 Vellalar College for Women, Erode, Tamilnadu, IN

Abstract

Obesity is very common among the higher income groups in India and other developing countries. Paleolithic diet or hunter-gatherer diet is currently popular for weight loss, diabetes management and general well-being. The present study was carried out to assess the nutritional status of the selected obese subjects who followed a modified lifestyle pattern for weight management and a group of subjects who followed paleo diet regularly. The data such as general information and socio-economic background, dietary pattern, anthropometric measurements, clinical, biochemical and biophysical parameters were collected from the selected subjects. Results showed that there is reduction in serum lipid profile except HDL in the subjects who followed lifestyle modifications and paleo diet is not a better choice for sustained weight management.

Keywords

Anthropometric Measurements, Lifestyle Modifications, Nutrition Education, Obesity, Paleolithic Diet.

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