International Journal of Advanced Research in

Science and Technology (IJARST)


Volume 4 - Issue 6 | 2015


01. Design of a faster 8T SRAM memory cell.

S.K.V.Prasad* and Rambabu

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Highlights

This paper discusses the design of read/write assist circuits which are used in a SRAM cell’s design to overcome the cell’s variations. It also explains the variability problems in a SRAM bit-cell and many approaches to address them. The basic operations, SNM concept, and write margin of an SRAM are described theoretically as well as measured in simulation. The write assisted circuit, the Negative Bit-line Voltage Bias scheme, is discussed and implemented at transistor level using a six-transistor (6T) SRAM cell. With the write assisted circuit, the implemented memory array successfully performs a write operation, the condition in which the same operation would fail without the write assisted circuit. During the simulation, this write assisted circuit helps to achieve the negative bias voltage of -70mV on the SRAM’s bit- lines. The cost overhead includes chip area, power consumption and chip area.

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02. Application of Student and Weibull statistical distributions on experimental tensile test results of steel wires extracted from antigyratory wire rope (19x7).

N.Mouhib*, H.Ouaomar, M.Lahlou, M.Barakat and M. El Ghorba

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Highlights

Throughout the life of a wire rope, the wires that make up this cable are subjected to high mechanical stress indicating a loss of the original force, which sometimes leads to very rapid deterioration leading to sudden rupture. Therefore, they must meet the strictest safety standards in their use because every failure causes material and immaterial damages. The interest of the present work is to apply two different statistical distributions; Student distribution to select the most reliable results and Weibull distribution to define probability of survival and the probability of failure (Reliability an damage of Weibull). As result of this study, confidence interval is determined for tensile test results and the superposition of the probability of survival and the probability of failure for both maximum stress and elastic stress curves allowed us to distinguish the elastic zone which is[0, 1850], the stable plastic zone [1850, 2250] and the unstable plastic zone [2240,2300] to intervene in time for a predictive maintenance.

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03. Student and Weibull Statistical Study applied on Experimental results of the P265GH Steel used for pressure vessel.

M. Lahlou*, H. Ouaomar, N. Mouhib, A. Hachim and M. El ghorba

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Highlights

This paper is devoted to study probability of survival and probability of failure (Reliability and damage of Weibull) of steel P256 GH used generally in pressure structures. Two statistical study are conducted the first is Student distribution that allowed us to extract the confidence interval for the maximum stress [469.29,473.16 ] and for elastic stress [308.66; 313.4].The second one is Weibull distribution which identified the characteristic elements of Weibull :the Weibull modulus m and scale factorσ0 required to calculate material probability of survival and its probability of failure.

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04. Study of specific energy in elastic phase of the different elements of a low voltage underground power cable.

H.Ouaomar*, N. Mouhib, M. Lahlou, A .Barakat and M. El Ghorba

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Highlights

Elements that constitute electric cables require a compromise between mechanical and electrical characteristics to achieve the desired functions, the choice of materials constituting each element involves economic and technical factors and requires a broad knowledge of materials to choose from. Unfortunately, by the external environment and operating conditions of these cables, the insulation material is subjected to various kinds of stresses, without forgetting the moisture effects that could not be prevented on the other elements of cable despite the presence of peripheral protective sheaths. The aim of this work is to study the mechanical behavior of underground electrical cable components. For this reason, a comparative study between the different specific energies in elastic phase of cables elements is performed. We concluded that the outer sheath has a specific energy in elastic phase considerably higher compared to the other elements energies, this elastic energy is extremely important for the used material, it increases the level of its performance and its endurance against mechanical stress. Therefore, it makes the material more reliable and increases its availability as well as its mechanical life time.

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05. Soil Analysis and Fertilizer Recommendations for Paddy Cultivars of Pentapadu Tehsil with Special Reference to Zinc.

D. Madhava Sarma*, B. Venkata Rao, M. Vasantha Lakshmi, B.Chakravarthi, P.S.S. Sravanthi and T.V.S. Padmavathi

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Highlights

ORYZA SATIVA (Paddy) is the main cultivated crop in the Pentapadu mandal of Andhra Pradesh. Growth and yield of any crop depends on factors like soil fertility and nutrient availability from the soil, besides other soil properties. To know the soil characteristics of the study area, soil samples are collected and analyzed for physico-chemical characteristics like pH, EC, % OC, macronutrients and micronutrients. It has been found that, in most of the soils zinc is below the critical value. According to recent studies, zinc deficiency in soils of Andhra Pradesh is further expected to increase from the current 49% to 63% by the year 2025 as most of the marginal soils are being brought under cultivation. It is proposed to advise the stake holders about the results obtained in this analysis so that they can apply the fertilizers according to the need only. Sincere efforts are going on to convince farmers about the use of fertilizers basing on soil testing is a good practice. It is a practical tool for optimizing the use of fertilizers which leads to higher yields.

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06. Testing the Clinical Programming Software of Cochlear Implant System.

P. Seetha Ramaiah, B. Uma Maheswararao, M. Sreedevi, Chiranjeevi. A and Putta Anushaa*

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Highlights

Computer based bio-electronic systems are used for replacement of damaged human parts such as Bionic-ear for deafness, Bionic-eye for blindness, Deep Brain Stimulator for diseases of the brain, and Bionic-arm for arm prostheses. Algorithms for controlling bionic system are based on the specific bionic devices like bionic ear with sound processing software and bionic eye with image processing software. A lot of research is going on to improve the performance of bionic systems in respect of achieving near 100% functionality, low cost and smaller sizes with higher reliability and safety. The aim of the paper is to design, development and testing for different bugs in clinical programming software (CPS) of a Cochlear Implant system that is also called as Bionic Ear. The focus of this paper is identification of different types of bugs like some of the common programming errors for CPS with suitable examples, Requirements, and Coding bugs. Testing must show that hazards have been eliminated or controlled to an acceptable level of risk. This collection is to create programmer aware of these errors of CPS of cochlear implant, so they avoid them and also develop the VB.NET based Clinical Programming for data monitoring of patient with profoundly deaf. In this some inadequate programming practices that are often the cause of many kinds of bugs in CPS.

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07. Notch effect on the behavior Mechanics to fracture of intake pipes for drinking water rigid PVC.

A.Ghizlane*, A. Hachim, .M.Chergui and M .Elghorba

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We studied the mechanical behavior of a polyvinyl chloride (rigid PVC) subjected to tensile tests, the notch effect is highlighted. The approach is to study and analyze the evolution of the overall geometry of the stress-strain curves or Force-displacement The work presented here is part of a comprehensive study to compare two kinds of pipes, degraded and non-degraded, in order to know the real causes of degradation of the mechanical intake pipes for drinking water.

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08. Comparison of Solar PV MPPT by Incremental Conductance and Perturb and Observation Method.

Abinash Mohapatra*, Jagdish Chandra Pati, Priyabrata Biswal and Chinmoy Kumar Panigrahi

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Highlights

Due to high demand and scarcity of conventional energy sources and mainly due to their high polluting factor it is now worldwide accepted that renewable energy is the suitable alternative for the existing power generation method. Out of the several options available in renewable energy generation methods solar PV is the most common. Due to its modularity, nonmoving parts, portability and clean energy production capacity it’s attracting more attention. In this paper different algorithms for MPPT such as Perturbation & Observation MPPT,Incremental Conductance MPPT have beenanalyzed to show which one is most efficient. In the paper all the algorithm methods are simulated and compared with each other to find the effective method.

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09. Habitat Suitability analysis for Chital (Axis axis) using Geo-spatial Technology of Panna National Park (M.P.) India.

Rajesh Kumar Prajapati*, Shashikant Triptathi and Rahasya Mani Mishra

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Highlights

The habitat fragmentation issue is of particular relevance to developing countries where most of the biodiversity rich tropical ecosystems are located. The purpose of this study was to produce habitat suitability model for the Chital in Panna National Park India (North latitude 24°27′ and 24°46′ and East longitude 79°45′ & 80°9′). Habitats were evaluated using Multi criteria analysis and habitat suitability index with remote sensing and GIS. Satellite imageries of LISS-III (IRS-P6, LISS-III) of study area were digitally processed. To generate collateral data, topographic maps were analyzed in a GIS framework. Layers of different variables such as: Land use/Land cover, forest density, proximity to disturbances and water resources and a digital terrain model were created from satellite and toposgraphic sheets. In the study area landscape, there are an only Ken River is the perennial water sources, the surrounding of the river is more suitable habitat for chital. Human settlements areas are usually avoided by wild animals. Species like the chital, which prefer edge habitats, generally avoid core areas of park.

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10. Degree Smoothing On Social Networks against Frequent Shared Patterns.

K. Anusha* and K. Venkata Ramana

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Advances in technology has made it possible to collect data about individuals and connections between them, such as Email correspondence and friendship. Researchers that have collected such social network data often have a compelling interest in allowing others to analyze the data. However sharing such kind of private information to the public will result in unacceptable disclosure. In this paper we present a framework of, how to provide privacy to individuals in a social network against the adversary from frequent shared patterns. We propose Degree Smoothing method by applying Anonymization and Isomorphism techniques. By taking real world examples we prove that, we can reduce the threat of frequent shared patterns in a social network.

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