A Survey on Secret Key Extraction Using Received Signal Strength in Wireless Networks

Secure wireless communications typically rely on secret keys, which are difficult to establish in an ad hoc network without a key management infrastructure. The channel reciprocity and spatial decorrelation properties can be used to extract secret key, especially in a Rayleigh fading channel. But the intervention of intermediate objects between the communication nodes reduces the strength of the secret key generated through such methods. Furthermore, the impact of small fluctuations also reduces the bit matching rate of such key agreement methods. This paper is based on the survey conducted on secret key generation from Received Signal Strength (RSS). By consider ing uniqueness property of RSS as base, various authors have proposed different methods for secret key extraction. Due to use of RSS for key extraction the existing systems suffer from predictable filter response at random period. The existing system also faces signal fading and drop in RSS because of intermediate object. By this survey we specify that even after generating high entropy bits for key extraction, there are considerable drawbacks in extracted key du e to intervention of intermediate objects and remarkable fading and drop in RSS

Oligonucleotide Based Magnetic Bead Capture of Onchocerca volvulus DNA for PCR Pool Screening of Vector Black Flies

The absence of infective larvae of Onchocerca volvulus in the black fly vector of this parasite is a major criterion used to certify that transmission has been eliminated in a focus. This process requires screening large numbers of flies. Currently, this is accomplished by screening pools of flies using a PCR-based assay. The number of flies that may be included in each pool is currently limited by the DNA purification process to 50 flies for Latin American vectors and 100 flies for African vectors. Here, we describe a new method for DNA purification that relies upon a specific oligonucleotide to capture and immobilize the parasite DNA on a magnetic bead. This method permits the reliable detection of a single infective larva of O. volvulus in pools containing up to 200 individual flies. The method described here will dramatically improve the efficiency of pool screening of vector black flies, making the process of elimination certification easier and less expensive to implement

Biotechnological Perspective of Reactive Oxygen Species (ROS)-Mediated Stress Tolerance in Plants

All environmental cues lead to develop secondary stress conditions like osmotic and oxidative stress conditions that reduces average crop yields by more than 50% every year. The univalent reduction of molecular oxygen (O2) in metabolic reactions consequently produces superoxide anions (O2•−) and other reactive oxygen species (ROS) ubiquitously in all compartments of the cell that disturbs redox potential and causes threat to cellular organelles. The production of ROS further increases under stress conditions and especially in combination with high light intensity. Plants have evolved different strategies to minimize the accumulation of excess ROS like avoidance mechanisms such as physiological adaptation, efficient photosystems such as C4 or CAM metabolism and scavenging mechanisms through production of antioxidants and antioxidative enzymes. Ascorbate-glutathione pathway plays an important role in detoxifying excess ROS in plant cells, which includes superoxide dismutase (SOD) and ascorbate peroxidase (APX) in detoxifying O2•−radical and hydrogen peroxide (H2O2) respectively, monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) involved in recycling of reduced substrates such as ascorbate and glutathione. Efficient ROS management is one of the strategies used by tolerant plants to survive and perform cellular activities under stress conditions. The present chapter describes different sites of ROS generation and and their consequences under abiotic stress conditions and also described the approaches to overcome oxidative stress through genomics and genetic engineering

User satisfaction on library resources and services in law college libraries in Mysore, Karnataka

The present study aims to assess the user satisfactionon library resources and services in law college libraries in Mysore in Karnataka. The investigator has distributed 200 questionnaires to the users, out of which 160 (80%) questionnaires were received back. The findings of the study shows that, 146 (91.25%) respondents visited law college libraries for borrowing library books and to read materials in their specific subjectsand they opined that ‘arrangement of text books’ as impressive. In terms of news paper clippings service, majority (91 ; 56.88%) of respondents are satisfied. The study suggested that law college libraries should carry out user studies at regular intervals in their colleges in order to identify and search the required information

Usage of social networking tools by the students of University of Mysore

This study is aimed at finding out the usage of social networking tools by the students of University of Mysore. One hundred thirty (130) students were used as sample population and a questionnaire was used to collect the primary data for the study. The social networking sites used by the students areWhats app, Facebook, Google+, YouTube and Twitter respectively. The study also revealed that many students are users of multiple social networking sites; and most of them use the networking sites to interact with friends. It was also noted that students have more friends on the social networks than they have in the physical; the social networks were found to have no effect on students’ (users’) academic performance

Genotoxic effect of distillery effluent on root tip cells of Allium Sativum L.

In the current study an attempt has been made to evaluate the cytotoxic efficacy of distillery effluent on somatic cells of Allium sativum. The garlic bulbs were treated with different concentrations of effluent viz. 2.5, 5, 7.5 and 10 at room temperature. The percentage mitotic index was found to be decreased significantly as the concentration of the effluent increased, except in 2.5 concentration, where the mitotic index is higher than control. The chromosomal abnormalities were found to be increased as the effluent concentration increased when compared to control. The observed chromosomal aberrations were laggards, fragmented chromosome, fragmented anaphase and metaphase, chromosomal bridges, micronuclei, lobed nucleus, scattered chromosome, disoriented anaphase, Polyploidy cells. According to present findings 2.5 concentration of the effluent was found to enhance the rate of cell division when compare to control on the contrary higher of the effluent showed negative effects on mitotic division in somatic cells of Garlic

Convenient synthesis of chromones and quinolinones

A one pot synthesis of substituted chromones and quinolinones by condensing commercially available and cheaper molecules like salicylic acid and anthranilic acid respectively with alkenes/nitriles followed by insitu cyclization using ammonium acetate as base has been achieved

Isolation and identification of airborne microflora in traffic intersection of Mysore city

The aim of the study was to isolate and identify airborne bacteria and fungi at the five traffic intersections namely Ramaswamy circle, Canara Bank circle, Milk Dairy Circle, Kiadb Industrial Area and Highway circle in Mysore city. The study was conducted for two hours at the peak hours of the day by the petriplate exposure method using nutrient agar and Czapek Dox agar media. The present study was aimed at finding the air borne microorganisms and pollutants of auto exhaust which cause hazardous effect on human health. There is a significant variation in the concentration of bacteria at different circles. The higher the concentration of bacteria was recorded in Canara bank circle and lowest concentration at Kiadb Industrial Area. Micrococcus one of the most dominant bacterial groups followed by Bacillus. Air borne fungi were dominant in Ramaswamy circle and Canara Bank circle whilethe lower levels were detected in the Kiadb Industrial Area. Fusarium, Cladosporium, Aspergillus niger, Alternaria and Trichoderma species were the dominant fungi were recorded in the circle