IMPACT : International Journal of Research in Engineering & Technology

11-18

Authors: MEGHA ARORA

Cloud computing provides with dynamically scalable infrastructure and virtualized resources that allow application to meet infinite demands , with cheap and reliable services to customers and assuring them with QoS inspite of unpredictable consumer behavior. In this paper we present ,factors that lead to emergence of cloud computing , comparative study from traditional system, principles of cloud computing, services provided by cloud computing, some case studies of Amazon.com, Google app engine and salesforce.com, recent advances and future scope of cloud computing

19-28

Authors: UMARU A. B, SANGODOYIN, A. Y2 & OKE, I. A

Forty two earth dams were randomly selected and investigated in North-Eastern Nigeria to determine the geological and hydrometeorological factors responsible for their failures and distresses. The Association of State Dam Safety Officials (ASDO) method was used to ass’s failures, distresses and functionality following a collection of data from Upper Benue River Basin Development Authority, States Ministries of Water Resources and the Nigerian Meteorological Agency. Site visits to randomly selected dams in the study area was done for observations and measurements. The geology of the study area is composed of Basement complex, Alluvium, Tertiary to recent Volcanics, Bima and Gombe Sandstones, Pindiga and Yolde formations, Granites and Igneous rocks among others. Of the dams sited on the Basement complex, 61, 27 and 11% were functional, failed and distressed respectively. The dams on Younger granites have an even number of failures and functionality. All the dams on Gombe sandstones and Pindiga formations are functional. The status of the dams were affected by two opposing scenarios, viz; the peak rainy season of August to September with monthly total rainfall ranging from 327.1mm to 478.8mm which recorded 75% of failures and distresses due to erosion, siltation and subsequent flooding. The dry season spanning October to February with monthly evaporation ranging from 354.6mm to 409.7mm and high temperatures in the range 39 - 430C witnessed 20% of dam failures with excessive loss of reservoir water by evaporation. It is suggested that adequate geological and hydrometreological studies be conducted and data used to guide construction and reservoir operations. Grouting, Impervious blanket, incorporation of cut-off wall and some form of soil stabilisation of earth dams is necessary to enhance stability and minimise seepage

47-56

Authors: GURUDUTT SAHNI, TAJINDER SINGH & JASPREET SINGH

The energy is the major concern in every engine which made it affordable and fit for commercial exploitation but every engine has difficulties in attaining efficiency level due to many reasons includes input cost, output power in comparison to input cost, etc. A wood gasifier is a gasification unit which converts timber or charcoal into wood gas, a syngas consisting of carbon monoxide, hydrogen, traces of methane, and other gases, which after cooling and filtering can then be used to power an internal combustion engine or for other purposes. Objective After the double fuel crises of 1973 and 1979, the harmful effect of high and rising oil prices on the economies and development efforts of oil-importing developing countries have become apparent. There has, as a result been increased interest in indigenous, renewable energy sources, of which biomass in the form of wood or agricultural residues are the most readily available in many developing countries. Experience from the Second World War shows, however, that properly designed wood gasifiers, operated within their design range and using fuels within the fuel specifications (which may differ between designs), can provide a sufficiently tar free gas for trouble-free operation. One of the objectives of this project is to make decision makers more aware of the possibilities of using wood gasification as a substitute for gasoline and diesel oil, without unreasonable increase of the demand on the natural resource

63-72

Authors: OMIDIORA, E. O, ADEGOKE, B. O, FALOHUN, S. A & OJO, D. A

Iris recognition has been actively researched in recent years. This paper provides an up-to-date review of major iris recognition researches. Strengths of iris recognition systems over other biometrics systems in security applications were first identified. After this, an overview of iris recognition and its applications was presented. Literature review of most recent iris recognition techniques is also presented. Description and limitations of the public iris databases which are used to test the performance of these iris recognition algorithms was also given

77-80

Authors: EKTA AGRAWAL, KUMAR MANU, RUCHI VARSHNEY & ANUPAM YADAV

Systolic arrays are a family of parallel computer architectures capable of using a very large number of processors simultaneously for important computations in applications such as scientific computing and signal processing. A discrete cosine transform (DCT) expresses a sequence of finitely many data points in terms of a sum of cosine functions at different frequencies. DCT is a Fourier-related transform similar to the discrete Fourier transform (DFT), but using only real numbers. DCTs are equivalent to DFTs of roughly twice the length, operating on real data with even symmetry