S.V.V Rama Devi* and S. Sreedhar
It is assumed that the fluids in the two regions are incompressible, immiscible and electrically conducting, having different viscosities, electrical conductivities. With these assumptions and considering that the magnetic Reynolds number is small the basic equations of motion, current, the no-slip boundary conditions at the walls and interface conditions between the twofluid regions have been formulated. The resulting governing linear differential equations are solved analytically, using the prescribed boundary and interface conditions to obtain the exact solutions for velocity distributions such as primary and secondary distributions in both regions. Also, their corresponding numerical results for various sets of values of the governing parameters are obtained to represent them graphically and are discussed in detail.
Umaprasada Rao B.* and Vasudeva Reddy P.
Blind signature, introduced by Chaum, allows a user to obtain a signature on a message without revealing anything about the message to the signer. Blind signatures play an important role in plenty of applications such as e-voting, e-cash system where anonymity is of great concern. Identity based (ID-based) public key cryptography can be a good alternative for certified based public key setting, especially when efficient key management and moderate security are required. In this paper, we propose an ID-based directed blind signature scheme (ID-DBS) from bilinear pairings, which combines the concepts of blind signatures and directed signatures. The proposed ID-DBS scheme allows a user to obtain a signature on a message without revealing anything about the message to the signer; and sends it to the designated verifier. The designated verifier can only verify the validity of the signature and in case of trouble or if necessary he can prove the validity of the signature to any other party. The proposed scheme is based on the Hess ID- based digital signature scheme. Finally, we discuss the correctness and security of the proposed ID-DBS scheme.
S. S. Sravanthi Pammi, T. V. S. Padmavathi and Archana Giri*
Herbs have always formed an integral part of human health and are used in the treatment of several human diseases. One of such species which have wide patronage of use is Phyllanthus amarus. This herb is in traditional medicine for more than 3,000 years. The plant has also served as lead for several experimental investigations that explored its phytochemical constituents and pharmacological uses. Present paper compiles traditional uses, phytoconstituents and pharmacological properties of Phyllanthus amarus.
Kamal Saran Rangavajhula*
WiMax (Worldwide Interoperability for Microwave Access) is the next step on the path to a wireless world, extending broadband wireless access to new areas and over farther distances, as well as considerably reducing the expenditure of deploying broadband to new locations. WiMax is a wireless digital communications system, also known as IEEE 802.16 that is intended for wireless "metropolitan area networks". WiMax can provide broadband wireless access (BWA) up to 30 miles (50 km) for fixed stations, and 3- 10 miles (5 -15 km) for mobile stations. In contrast, the Wi-Fi/802.11 wireless local area network standard is limited in most cases to only 100 -300 feet (30 - 100m). WiMax is the industry term for a long-range networking standard. WiMax technology has potential to deliver the high-speed Internet access to rural areas and other locations not serviced by cable or DSL technology. WiMax offers an alternative to satellite Internet services..
Adum Joseph* , Sarah Philipo Owoya, and Edward Onyango Orinda
This research was purposely conducted to assess the utilization of social networking media (SNM), and to determine the challenges of SNM in selected Universities in Tanzania. The descriptive survey research design was used, and the respondents were students who were selected randomly. The main instrument was a questionnaire which was distributed to the respondents. The researcher collected 30 completed questionnaires which was the sample size. Data were analyzed using frequency, tables, and percentage.
S. S. Sravanthi Pammi, T. V. S. Padmavathi and Archana Giri*
Phytochemical screening of the extracts in different parts of Phyllanthus amarus revealed the presence of alkaloids, flavonoids, tannins, saponins, steroids and terpenoids. The presence of various bioactive compounds in the plant parts of Phyllanthus amarus helps us to evaluate growth effects of some selected bacteria. The development of resistance against conventional antibiotics by pathogens is of great concern. Leaf, stem and root of Phyllanthus amarus were separately extracted with 70 % ethanol and 70 % methanol and the crude extracts were assayed for six pathogenic microorganism’s viz. Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Salmonella typhi and Proteus mirabilis for susceptibility to the various extracts of P. amarus in vitro. The zones of inhibition of both plant extracts ranged between 7.5-30.0 mm against the test organisms. Leaf extracts of Phyllanthus amarus were most active against the growth of the bacteria. S. aureus was the most susceptible organism and the most resistant bacterium was P. aeruginosa to the ethanolic extracts basing on MIC values obtained for leaf,stem and root parts of P.amarus.. Ciprofloxacin and Chloramphenicol were the standard antibiotics that were used..
K. Chandramohan*, P. V. Prasanna and P. Ramachandra Reddy
This paper deals with the distributional notes on Lophopogon kingii Hook.f., which is an endemic grass reported from the Eastern Ghats. Detailed description and illustration are provided here for easy identification.
Battula Kasi Viswanadham*
Commercial banks play a vital role in economic development of a country like our India. Banks promote capital formation which is the most important problem of developing a country. Commercial banks are playing an active role to educate rural people and mobilize their daily savings. Commercial banks accepting deposits from general public and use this deposits to other’s investment for the purpose of growth of economic in our country.
Economic development in India depends on real factors like internal trading, agricultural sectors, industrial sectors; expansion of foreign trade especially exports, etc. Commercial banks keeping the middle category population in our country in their view started giving advanced credit for purchase of durable consumer items like vehicles, televisions, refrigerators etc.
J Mahesh Kumar*
Researchers are experimenting with carbon nanotubes to Phenomenally change the way semiconductor devices are made. At the same time, there are innovations to address immediate needs such as improving yield, decreasing time – to – market, reducing leakage power, thermal management in multi – die stacks, new layout requirement and so on.
B. Samatha and M. Bhupathi Rayalu*
The common evening brown butterfly, Melanitis leda Linn. is seasonal in its occurrence at Visakhapatnam (17O42'N and 82O18' E), South India, during September to March. It utilizes Brachiaria distachya (Linn.) Stapf. for oviposition and as larval host. It lays eggs singly. The hatched larvae show five instars. It shows light green colour with a pair of horns in the head region. Pupa shows green colour with a mid-dorsal dark green line. The developmental time from egg to adult emergence was 27 – 35 (31.40 ± 3.43) days in the laboratory conditions with 28 ± 2OC, 80 ± 10% relative humidity, 12 – 14 h day-length. The early lifestages (eggs, larvae, pupae) are evident on B. distachya for a period of 150 days during September to January, thus producing an estimated three to four overlapping broods per year. There was a relatively high frequency of the early lifestages during October to December corresponding to rainy and winter seasons. Probably this Satyrid may require more moist and shady conditions for its occurrence and reproduction throughout the year. Such conditions were not available in the study biotope throughout the year, hence its occurrence over a limited part of the year. The larvae were efficient in consuming and utilizing the host leaves as indicated by the food utilization and nutritional indices of different instars. Approximate digestibility (AD) 96.66% - 57.24%, efficiency of conversion of ingested food to body substance (ECI) 6.66% - 36.52%, efficiency of conversion of digested food to body substance (ECD) 6.89% - 51.76%.
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