Browsing by Author "Ramya, S."

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    Bond strength characteristics of masonry using hemp fibre and chicken mesh reinforced mortar
    (Elsevier Ltd, 2023) Mahesh, J.V.; Ramya, S.; Marulasiddappa, B.M.; Raveesh, R.M.
    The bonding between the masonry unit and mortar plays very important role in strength of masonry. To improve the bond strength, we need to concentrate on the mortar properties. The present study focusses on the bond strength of masonry by adding reinforcement for the mortar. The hemp fibre and chicken mesh are used as a reinforcement for the mortar. For the test masonry triplets are used with mortar of proportion 1:4. The optimum dosage for hemp fibre is found to be 2% and chicken mesh is added along with mortar joints. The bond strength was tested in universal testing machine and the results have compared each other. From the study it was found that, the bond strength of hemp fibre reinforced triplets is found to be 27% higher than the chicken mesh reinforcement and 73% higher than the unreinforced mortar masonry. © 2023
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    Fading mitigation technique for MIMO in free space optical system
    (2016) Jeyarani, J.; Kumar, D.S.; Ramya, S.
    Free space optical (FSO) communications is the line of sight technology and its cost-effective and wide-bandwidth access technique for high data rates applications. In FSO system, the performance analysis over turbulence channels is limited, when using multiple apertures at both transmitter and receiver sides. Fading mitigation technique conditions is generalized to explore the ergodic capacity of multiple-input multiple-output (MIMO) system. The gamma-gamma distribution is used to analyze the fluctuations of the irradiance of optical channels distorted by atmospheric conditions. To evaluate the receiver performance analytically, we use an ?-? distribution to efficiently approximate probability density function (PDF) of the sum of independent and identical distributed ET RVs through moment-based estimators. The sum of independent and but not necessarily identically distributed RVs is used to efficiently approximate PDF of Distribution. High signal to noise ratio is achieved for fading scheme to get insights into impact of system and channel parameter on ergodic capacity. Monte-carlo simulations is validated in our proposed results. � 2015 IEEE.
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    Fading mitigation technique for MIMO in free space optical system
    (Institute of Electrical and Electronics Engineers Inc., 2016) Jeyaseelan, J.; Sriram Kumar, D.S.; Ramya, S.
    Free space optical (FSO) communications is the line of sight technology and its cost-effective and wide-bandwidth access technique for high data rates applications. In FSO system, the performance analysis over turbulence channels is limited, when using multiple apertures at both transmitter and receiver sides. Fading mitigation technique conditions is generalized to explore the ergodic capacity of multiple-input multiple-output (MIMO) system. The gamma-gamma distribution is used to analyze the fluctuations of the irradiance of optical channels distorted by atmospheric conditions. To evaluate the receiver performance analytically, we use an α-μ distribution to efficiently approximate probability density function (PDF) of the sum of independent and identical distributed ET RVs through moment-based estimators. The sum of independent and but not necessarily identically distributed RVs is used to efficiently approximate PDF of Distribution. High signal to noise ratio is achieved for fading scheme to get insights into impact of system and channel parameter on ergodic capacity. Monte-carlo simulations is validated in our proposed results. © 2015 IEEE.