Tag Archives: Eigenvalues

An Investigation on Crime Rate in Southeastern Nigeria (Published)

The modern world is everything but a safe place. This sad but indisputable fact has been proven to be true by several research. Crime rate is souring in this part of the continent and there exists many determinant to this anti-societal behavior amongst the people. In this paper, those variables that are crime prone in Southeastern Nigeria over a 10 year study period were determined using Principal Component Analysis (PCA); a Multivariate Statistical Technique that is use to reduce the dimensionality of a large number of interrelated crime variables while retaining as much of the information as possible. Data were collected on seven crime variables, from the data bank of National Bureau of Statistics (NBS). Moderate correlations exists between sizeable number of crimes, two principal components was extracted using the scree plot, explaining 86.4% of the total variation in the dataset. The highest and most committed crime in the study region are Armed Robbery, Murder and Grievous Harm and Wounding

Keywords: Eigenvalues, Principal Component Analysis, crime rate, scree plot, southeastern nigeria

An Investigation on Crime Rate in Southeastern Nigeria (Published)

The modern world is everything but a safe place. This sad but indisputable fact has been proven to be true by several research. Crime rate is souring in this part of the continent and there exists many determinant to this anti-societal behavior amongst the people. In this paper, those variables that are crime prone in Southeastern Nigeria over a 10 year study period were determined using Principal Component Analysis (PCA); a Multivariate Statistical Technique that is use to reduce the dimensionality of a large number of interrelated crime variables while retaining as much of the information as possible. Data were collected on seven crime variables, from the data bank of National Bureau of Statistics (NBS). Moderate correlations exists between sizeable number of crimes, two principal components was extracted using the scree plot, explaining 86.4% of the total variation in the dataset. The highest and most committed crime in the study region are Armed Robbery, Murder and Grievous Harm and Wounding.

Keywords: Eigenvalues, Principal Component Analysis, crime rate, scree plot, southeastern nigeria

Comparison Between STATCOM-POD and PSS For Small Signal Stability Enhancement (Published)

The growth of the modern power system with the continuous change in power demand and
supply has led to an increasing complexity in the study of power systems analysis, and in particular, to the aspects of transient stability and small-signal stability. The enhancement of power system stability using PSS (power system stabilizer) which is used to improve low frequency oscillations as a type of the rotor angle stability and STATCOM-POD (Static Synchronous Compensator with power oscillation damper) which is an effective FACTS (Flexible AC Transmission System) device capable of controlling the active and reactive power flows in a transmission line by controlling appropriately parameters also improve low frequency oscillations due to POD controller with STATCOM. In this Paper comparison between PSS and STATCOM-POD performance for power system stability enhancement of the 14-bus test system network is investigated. The comparison is based on investigation of the eigenvalues of the linearized power system model in the framework of dynamic hopf- bifurcation theory.

Keywords: Eigenvalues, HOPF-Bifurcations, POD, PSS, STATCOM, Stability