Geographical location of Vedic Irina in Southern Rajasthan (2007)
Vedic literature refers to a place or region by name Irina. In the Rgveda it appears as a locale frequented by a particular wild animal for drinking water. But with the passage of time, in the...
Estimation of seismic spectral acceleration in Peninsular India (2007)
Peninsular India (PI), which lies south of $24^oN$ latitude, has experienced several devastating earthquakes in the past. However, very few strong motion records are available for developing...
Geographical location of Vedic Irina in Southern Rajasthan (2007)
Vedic literature refers to a place or region by name Irina. In the Rgveda it appears as a locale frequented by a particular wild animal for drinking water. But with the passage of time, in the...
Estimation of seismic spectral acceleration in Peninsular India (2007)
Peninsular India (PI), which lies south of $24^oN$ latitude, has experienced several devastating earthquakes in the past. However, very few strong motion records are available for developing...
Estimation of seismic spectral acceleration in Peninsular India (2007)
Peninsular India (PI), which lies south of $24^oN$ latitude, has experienced several devastating earthquakes in the past. However, very few strong motion records are available for developing...
Seismic hazard estimation for Mumbai city (2006)
This article presents an engineering approach to estimate the existing seismic hazard for Mumbai city. After assembling a catalogue of past earthquakes and analysing the database statistically, the...
Forecasting of seasonal monsoon rainfall at subdivision level (2006)
It is shown that time series data of monsoon seasonal rainfall at subdivision level is decomposable into six uncorrelated components. These narrowband processes called intrinsic mode functions, in...
The Enoshima Engi (EE) was written in AD1047 by the Japanese monk Kokei. The narrative mentions spectacular phenomena that took place in the early summer of AD552, including dark clouds covering the...
On Some Comet Observations in Ancient India (2006)
A brief review of the ancient prose text of Parasara, referring to comets, as transmitted by later non-religious Sanskrit literature is presented. The information passed on appears to belong to 2nd...
Strong Ground Motion Estimation During the Kutch, India Earthquake (2006)
In the absence of strong motion records, ground motion during the 26th stop January, 2001 Kutch, India earthquake, has been estimated by analytical methods. A contour map of peak ground acceleration...
Forecasting of seasonal monsoon rainfall at subdivision level (2006)
It is shown that time series data of monsoon seasonal rainfall at subdivision level is decomposable into six uncorrelated components. These narrowband processes called intrinsic mode functions, in...
Seismic hazard estimation for Mumbai city (2006)
This article presents an engineering approach to estimate the existing seismic hazard for Mumbai city. After assembling a catalogue of past earthquakes and analysing the database statistically, the...
The Enoshima Engi (EE) was written in AD1047 by the Japanese monk Kokei. The narrative mentions spectacular phenomena that took place in the early summer of AD552, including dark clouds covering the...
On Some Comet Observations in Ancient India (2006)
A brief review of the ancient prose text of Parasara, referring to comets, as transmitted by later non-religious Sanskrit literature is presented. The information passed on appears to belong to 2nd...
Investigation of a non-linear system under partially prescribed random excitation (2005)
The problem of non-linear systems excited by random forces with known power spectral density functions and unspecified probability structure is considered. Sufficient, but not necessary, conditions...
Intrinsic mode functions and a strategy for forecasting Indian monsoon rainfall (2005)
Indian monsoon rainfall data is shown to be decomposable into six empirical time series, called intrinsic mode functions. This helps one to identify the first empirical mode as a nonlinear part and...
A description of Dwaraka and its environs, its growth and final destruction as narrated in the ancient classics of Mahabhratha, Hari-vamsa, Skanda Purana and Visnu Purana is presented and it is shown...
Investigation of a non-linear system under partially prescribed random excitation (2005)
The problem of non-linear systems excited by random forces with known power spectral density functions and unspecified probability structure is considered. Sufficient, but not necessary, conditions...
Intrinsic mode functions and a strategy for forecasting Indian monsoon rainfall (2005)
Indian monsoon rainfall data is shown to be decomposable into six empirical time series, called intrinsic mode functions. This helps one to identify the first empirical mode as a nonlinear part and...
A description of Dwaraka and its environs, its growth and final destruction as narrated in the ancient classics of Mahabhratha, Hari-vamsa, Skanda Purana and Visnu Purana is presented and it is shown...
Microzonation of earthquake hazard in Greater Delhi area (2004)
A spate of earthquakes in the recent past, causing extensive damage,has heightened the sensitivity of engineers and planners to the looming seismic risk in densely populated Indian cities. Delhi city...
Description of rainfall variability in Br hat -samhita of Varâha-mihira (2004)
Br hat -samhita of Varâha-mihira (5–6th century AD) provides valuable information on the approach in ancient India towards monsoon rainfall, including its measurement and forecasting. In this...
Attenuation of Strong Ground Motion in Peninsular India (2004)
Earthquakes in India occur in the plate boundary region of the Himalayas as well as in the intraplate region of Peninsular India (PI). Devastating events have occurred in PI in the recent past, which...
Description of rainfall variability in Br hat -samhita of Varâha-mihira (2004)
Br hat -samhita of Varâha-mihira (5–6th century AD) provides valuable information on the approach in ancient India towards monsoon rainfall, including its measurement and forecasting. In this...
Microzonation of earthquake hazard in Greater Delhi area (2004)
A spate of earthquakes in the recent past, causing extensive damage,has heightened the sensitivity of engineers and planners to the looming seismic risk in densely populated Indian cities. Delhi city...
Earthquake source model using strong motion displacement as response of finite elastic media (2001)
Iyengar, RN, Agrawal, Shailesh KR
The strong motion displacement records available during an earthquake can be treated as the response of the earth as the a structural system to unknown forces acting at unknown locations. Thus, if...
Earthquake source model using strong motion displacement as response of finite elastic media (2001)
Iyengar, RN, Agrawal, Shailesh KR
The strong motion displacement records available during an earthquake can be treated as the response of the earth as the a structural system to unknown forces acting at unknown locations. Thus, if...
Regionalization of Indian monsoon rainfall and long-term variability signals (1994)
Large regions in India with homogeneous variability of monsoon rainfall are identified with the help of principal component analysis. Four major regions, called principal regions, are first...
Regionalization of Indian monsoon rainfall and long-term variability signals (1994)
Large regions in India with homogeneous variability of monsoon rainfall are identified with the help of principal component analysis. Four major regions, called principal regions, are first...
Chaotic behaviour in nonlinear oscillators (1993)
The author asks, in the limit the initial variances go to zero, does the response variance in time also go to zero? If it does, the author calls the given nonlinear system deterministic, otherwise...
Chaotic behaviour in nonlinear oscillators (1992)
The author asks, in the limit the initial variances go to zero, does the response variance in time also go to zero? If it does, the author calls the given nonlinear system deterministic, otherwise...
Internal resonance and nonlinear response of a cable under periodic excitation (1991)
Rao, Visweswara G, Iyengar, RN
The coupled non-linear equations of motion of a sagged cable in its first symmetric mode of in-plane and out-of-plane oscillations are solved by the method of multiple scales for its forced vibration...
Application of principal component analysis to understand variability of rainfall (1991)
The usefulness of principal component analysis for understanding the temporal variability of monsoon rainfall is s.tudied. Monthly rainfall data of Karnataka, spread on 50 stations for a period of 82...
Stochastic characterization of chaos in a nonlinear system (1991)
The solution of a nonlinear oscillator with random initial conditions is considered. The differential equations governing the moments of the response are derived. In the limit the variances of the...
Stochastic characterization of chaos in a nonlinear system (1991)
The solution of a nonlinear oscillator with random initial conditions is considered. The differential equations governing the moments of the response are derived. In the limit the variances of the...
Application of principal component analysis to understand variability of rainfall (1991)
The usefulness of principal component analysis for understanding the temporal variability of monsoon rainfall is s.tudied. Monthly rainfall data of Karnataka, spread on 50 stations for a period of 82...
Internal resonance and nonlinear response of a cable under periodic excitation (1991)
Rao, Visweswara G, Iyengar, RN
The coupled non-linear equations of motion of a sagged cable in its first symmetric mode of in-plane and out-of-plane oscillations are solved by the method of multiple scales for its forced vibration...
Entrainment in Van der Pol's oscillator in the presence of noise (1991)
The response of Van der Pal’s oscillator to a combination of harmonic and white noise excitations is considered. The harmonic excitation frequency is taken to be in the neighbourhood of the system...
Entrainment in Van der Pol's oscillator in the presence of noise (1991)
The response of Van der Pal’s oscillator to a combination of harmonic and white noise excitations is considered. The harmonic excitation frequency is taken to be in the neighbourhood of the system...
Free Vibrations and Parametric Instability of a Laterally Loaded Cable (1988)
In this paper a linear analysis is presented for the coupled vertical, longitudinal and lateral oscillations of a cable with a small sag-to-span ratio. Generally, the lateral oscillations are treated...
Stochastic Response and Stability of the Duffing Oscillator under Narrowband Excitation (1988)
The Duffing equation under narrowband Gaussian excitation is studied. Almost sure asymptotic stability analysis is used to discuss the realizability of multivalued steady states. The theoretical...
Stochastic Response and Stability of the Duffing Oscillator under Narrowband Excitation (1988)
The Duffing equation under narrowband Gaussian excitation is studied. Almost sure asymptotic stability analysis is used to discuss the realizability of multivalued steady states. The theoretical...
Free Vibrations and Parametric Instability of a Laterally Loaded Cable (1988)
In this paper a linear analysis is presented for the coupled vertical, longitudinal and lateral oscillations of a cable with a small sag-to-span ratio. Generally, the lateral oscillations are treated...
Classification and rating of strong-motion earthquake records (1983)
Ninety-two strong-motion earthquake records from the California region, U.S.A., have been statistically studied using principal component analysis in terms of twelve important standardized...
Analysis of Randomly Time Varying Systems By Gaussian Closure Technique (1982)
The Gaussian probability closure technique is applied to study the random response of multidegree of freedom stochastically time varying systems under non-Gaussian excitations. Under the assumption...
Analysis of randomly time varying systems by gaussian closure technique (1982)
The Gaussian probability closure technique is applied to study the random response of multidegree of freedom stochastically time varying systems under non-Gaussian excitations. Under the assumption...