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Das, Susmita
- Agile Software Development Methodology and its Cost Estimation Technique
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National Journal of System and Information Technology, Vol 4, No 2 (2011), Pagination: 209-225Abstract
This study bridges the gap between the software Industry and Academia through improvisation of some technique into one methodology. The main objective of this article is three-fold: 1) to focus upon development practices used by small software firm. 2) to study the documentation practices in small software firm and suggest one type of documentation practice which will be beneficial for the current practice 3) to find the solution of problem faced by the small firm while materializing the requirement story board drawn by the client into cost estimation. Together with these a simple and easy to use empirical formula for the evaluation of the cost for the Agile development of a medium-size software has been proposed from the past resultant data of developmentKeywords
Agile, SDLC, Software Development, Extreme Programming, SCRUM
References
- Agile Manifesto: “Manifesto for Agile Software Development“ http://www. agilemanifesto.org/, December 2007; Beck, Kent; et al. (2001). "Manifesto for Agile Software Development", Agile Alliance. Retrieved ,14 June 2010.
- Gerald M. Weinberg, as quoted in Larman, Craig; Basili, Victor R. (June 2003). "Iterative and Incremental Development: A Brief History". Computer 36 (6): 47–56.
- Edmonds, E. A. (1974). "A Process for the Development of Software for Nontechnical Users as an Adaptive System". General Systems 19: 215–18.
- Vijayasarathy L.R. and Turk Dan, “Agile Software Development: A Survey of Early Adopters”, Journal of Information Technology Management, Vol. XIX, No. 2, 2008, pp 1-8
- http://en.wikipedia.org/wiki/Agile_software_development
- Larman, Craig (2004). Agile and Iterative Development: A Manager's Guide. Addison-Wesley. p. 27. ISBN 978-0-13-111155-4.
- Drobka, J.; Noftz, D. and Raghu R. “ Piloting XP on Four Mission Critical Projects.”, IEEE Software, Vol 21, No. 6, 2004, pp 70-75.
- Schatz, B. and Abdelshafi, I. “ Primavera Gets Agile: A Successful Transition to Agile Development” IEEE Software, Vol 22. No. 3, 2005, pp36-42.
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- Maurer, F. and Martel, S. Extreme Programming: Rapid Development for Web-Based Applications, IEEE Internet Computing. 6(2002) p 86-90.
- Mahnic, V. and Zabkar N. Using cobit indicators for measuring scrum-based software development, WSEAS Transactions on Computers vol. 7, 2008, 1605-1617.
- Cockburn, A., Agile Software Development, Addison-Wesley Longman Publishing Co., Inc. Boston, MA, USA ©2002; Agile Model Driven Development with UML2- By S Ambler, Camb. Univ. Press 2004(3rd Edition).
- James E. Tomayko, An Historian’s view of Software Engineering”, in the proceeding of the IEEE Conference on Software Engineering Education and Training, IEEE Society Press, Los Alamitos, Ca., 2000.
- Willams, “ The XP Programmer: The Few-Minutes Programmer”, IEEE Software,2003, Vol. 20, pp16-20.
- Boehm, B.W. Software engineering economics, Prentice Hall, Englewood Cliffs, N.J. 1881.
- Boehm, B.W. Software engineering economics, IEEE Transaction on Software Engineering Economics, IEEE Transaction on Software Engineering, 10(1):135-152, Jan. 1984.
- Kent Beck, “ Extreme Programming Explained : Embrace Change,” Addison- Wesley, 2000
- Alistair Cockburn, Re-examining the Cost of Change Curve, year 2000, , XP Magazine, September 2000.
- Scott Ambler, Examining the Cost of Change Curve,; Agile Modeling Essays expected from the book “The Object Primer, 3rd ed.: Agile Model Driven Development with UML2”, by Scott Ambler, Cambridge University Press, 2004.
- Martin Flower, “ Is Design Dead?”, http://martinflower.com/article/designDead.html, 2004.
- Narrowband Interference Reduction Technique in Impulse Radio (IR) UWB Communication System Coexisting in WPAN and Underwater Environment
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Authors
Affiliations
1 Department of Electrical Engineering, Veer Surendra Sai University of Technology, IN
2 Department of Electrical Engineering, National Institute of Technology Rourkela, IN
1 Department of Electrical Engineering, Veer Surendra Sai University of Technology, IN
2 Department of Electrical Engineering, National Institute of Technology Rourkela, IN
Source
ICTACT Journal on Communication Technology, Vol 3, No 1 (2012), Pagination: 478-487Abstract
The Impulse Radio based Ultra Wideband (IR-UWB) system transmits data by sending pulses, each with very small time duration followed by pauses that are approximately two hundred times that length. Rake receiver improves system performance by equalizing signals from different paths. This enables the use of Rake receiver techniques in UWB systems. For high data rate ultra-wideband communication system, performance comparison of ARake, PRake and SRake receivers are attempted. Although UWB communication offers a promising solution in an increasingly overcrowded frequency spectrum, mutual interference due to coexistence with other spectrally overlapping wireless system degrades the performance of both systems. The narrow band systems may cause interference with UWB devices as it is having very low transmission power and the large bandwidth. So it may jam the UWB receiver completely degrading their performance. Rake receiver alone fails to perform in such condition. A hybrid SRAKE-MMSE time domain equalizer is proposed to overcome this by taking into account both the effect of the number of rake fingers and equalizer taps. This scheme selects the first strongest multipath components and combines them using a SRake receiver based on the minimum mean square error (MMSE) criterion. It also combats inter-symbol interference by considering the same advantages. Study on non-line of sight indoor channel models illustrates that bit error rate performance of UWB SRAKE-MMSE (both LE and DFE types) improves for CM3 model with smaller spread compared to CM4 channel model cancelling out the narrowband interference. A modified UWB channel model is proposed using the Rician distribution for underwater communication. Again BER performance of the proposed receiver is compared with traditional receiver technique for the underwater UWB LOS channel model.Keywords
RAKE-MMSE, LE, DFE, IEEE 802.15.3a, Underwater, NBI.- Performance Improvement of OFDM System by Peak to Average Power Reduction through Pulse Shaping Technique
Abstract Views :167 |
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Authors
Affiliations
1 Department of Electrical Engineering, National Institute of Technology, Rourkela, IN
1 Department of Electrical Engineering, National Institute of Technology, Rourkela, IN
Source
ICTACT Journal on Communication Technology, Vol 1, No 4 (2010), Pagination: 202_206Abstract
OFDM is a form of multicarrier modulation technique with high spectral efficiency, robustness to channel fading, immunity to impulse interference, uniform average spectral density capacity of handling very strong echoes and non-linear distortion. Despite of its many advantages, one major disadvantage of OFDM is that the time domain OFDM signal which is a sum of several sinusoids leads to high peak to average power ratio (PAPR). The peak to average power ratio of the time domain envelope is an important parameter at the physical layer of the communication system using OFDM signaling. The signals must maintain a specified average energy level in the channel to obtain the desired Bit-error-rate. Pulse shaping techniques are very effective and mitigate problems associated with PAPR. In this paper conventional pulse shapes like Raised Cosine (RC), and sinc Power (SP) pulses are modified as Modified Raised Cosine Pulse (MRC) and Improved sinc Power pulse (ISP) introducing design parameter 'd' and amplitude parameter 'a' etc . The proposed method has fast decaying rate by decreasing the lobes of sinc function and its implementation complexity is also less. In this paper OFDM system performance measures like Complementary Cumulative Distribution Function (CCDF) of PAPR and bit error rate (BER) are analyzed through MATLAB simulation which proves the efficacy of the proposed pulse shaping scheme. It was observed from the performance curves using ISP pulse shaping filter at the OFDM transmitter's end outperforms others.Keywords
OFDM, Peak-to-Average Power Ratio (PAPR), Pulse Shaping, CCDF, Bit Error Rate.- Natural Microbial Resources and their Role in Sustainable Development of Aquaculture
Abstract Views :216 |
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Authors
Affiliations
1 Department of Zoology, University of Kalyani, W. B., IN
2 Department of Botany, University of Kalyani, W. B., IN
1 Department of Zoology, University of Kalyani, W. B., IN
2 Department of Botany, University of Kalyani, W. B., IN
Source
Journal of Environment and Sociobiology, Vol 16, No 1 (2019), Pagination: 111-115Abstract
Global fish production continues to outpace world population growth and aquaculture remains one of the most promising as well as fastest growing industries and provides high quality protein diets. Over the last three decades, much effort in research has increased in fish growth efficiency by manipulation of dietary formulation. Along with the increasing demand, the main challenge is disease outbreak and thus massive economic losses. Due to harmful effects of vaccines, antibiotics and various chemotherapeutics, an alternate approach can be used for naturally occurring microbial resources in aquaculture system to enhance growth, immune system and also to control diseases. The present work concentrate on the gut microbes of vermicomposting earthworm and role of cellulolytic microbes in fish feed formulation with the help of fermentation process.Keywords
Natural resources, Earthworm, Microorganisms, Aquaculture.References
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- Parthasarathi, K., Ranganathan, L. S., Anandi, V. and Zeyer, J. 2007. Diversity of microflora in the gut and casts of tropical composting earthworms reared on different substrates. J. Environ. Biol., 28(1): 87-97.
- Teather, R. M. and Wood, P. J. 1982. Use of Congo red polysaccharide interactions in enumeration and characterization of cellulolytic bacteria from the bovine rumen. Appl. & Environ. Microbiol., 43(4): 777-780.
- Toyota, K. and Kimura, M. 2000. Microbial community indigenous to the earthworm Eisenia foetida. Biology and Fertility of Soils, 31(3-4): 187-190.
- Uma Maheswari, N. and Sudha, S. 2013. Enumeration and detection of phosphate solubilizing bacteria from the gut of earthworm varieties. J. Chem. & Pharm. Res., 5(4): 264-267.