JBAS Articles
JBASV8N2A18- Evaluation of Basic Data Compression Algorithms in a Distributed Environment
Journal of Basic and Applied Sciences - Volume 8 Number 2
Evaluation of Basic Data Compression Algorithms in a Distributed Environment
Minhaj Ahmad Khan
http://dx.doi.org/10.6000/1927-5129.2012.08.02.18
Abstract: Data compression methods aim at reducing the data size in order to make data transfer more efficient. To accomplish data compression, the basic algorithms such as Huffman, Lempel-Ziv (LZ), Shannon-Fano (SF) and Run-Length Encoding (RLE) are widely used. Most of the applications incorporate different variants of these algorithms. This paper analyzes the execution times, compression ratio and efficiency of compression methods in a client-server distributed environment. The data from a client is distributed to multiple processors/servers, subsequently compressed by the servers at remote locations, and sent back to the client. Our experimentation has been carried out using Simgrid Framework. Our results show that the LZ algorithm attains better efficiency/scalability and compression ratio, however, it works slower than other algorithms.
Keywords: Distributed Computing, Compression, LZ, Shannon-Fano, RLE, Huffman, Scalability.
JBASV8N2A19- Hazardous Effects of Lead Acetate on Heavy Proteins of Bactrocera zonata
Journal of Basic and Applied Sciences - Volume 8 Number 2
Hazardous Effects of Lead Acetate on Heavy Proteins of Bactrocera zonata
Rizwan ul Haq
http://dx.doi.org/10.6000/1927-5129.2012.08.02.19
Abstract: Lead is presume to be an important toxic waste which contaminate the environment, therefore, insects could be influenced easily by the lead., Bactrocera zonata was studied at 48 hours post treatment, under the effects of lead acetate, in different concentrations. It was observed that under the effects of lead abnormalities and malformation were developed in the larvae of flies. Thus these flies could present a useful module for the quick transmission of the environmental hazards due to lead contamination, which exerts a specific physiological and morphological effect on these flies.
Keywords: Effects, Lead acetate, Proteins, Bactrocera zonata.
JBASV8N2A20- Investigating the Influence of Cosmic Rays on Ozone Layer Depletion at Beijing, China
Journal of Basic and Applied Sciences - Volume 8 Number 2
Investigating the Influence of Cosmic Rays on Ozone Layer Depletion at Beijing, China
Bulbul Jan and M. Ayub Khan Yousuf Zai
http://dx.doi.org/10.6000/1927-5129.2012.08.02.20
Abstract: In the present study monthly and annually data of ozone depth and cosmic rays (CRs) intensity at China Beijing during the period of 1984-2010 have been analyzed to investigate the effects of cosmic rays intensity on ozone layer depletion (OLD). This communication implements statistical analysis on the data sets for the specified period mentioned above. The analyses exhibit that mean monthly variation of cosmic rays intensity increases. Our investigation claims that in the month of May (1984-2010) changes occurred in the decrease the ozone depth due to the increase in cosmic rays intensity .This sort of study confirms cosmic rays influence on the ozone layer depletion.
Keywords: Cosmic rays, Ozone depletion, Climate change.
JBASV8N2A3- A Validation of the Real Zeros of the Riemann Zeta Function via the Continuation Formula of the Zeta Function
Journal of Basic and Applied Sciences - Volume 8 Number 2
A Validation of the Real Zeros of the Riemann Zeta Function via the Continuation Formula of the Zeta Function
O.O.A. Enoch and F.J. Adeyeye
http://dx.doi.org/10.6000/1927-5129.2012.08.02.03
Abstract: In this paper, the analytic continuation formula of the Riemann zeta function is presented as a function of t2n,
thus validating Riemann's claim that ε(t) allows itself to be developed in the power of t2. It is also shown that the root of
ε(t) is always real. A theorem to validate the real roots is established.
Keywords: Meromorphic functions, Riemann zeta functions, zeros Riemann hypothesis