University of Nebraska Omaha

About: University of Nebraska Omaha is a education organization based out in Omaha, Nebraska, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 4526 authors who have published 8905 publications receiving 213914 citations. The organization is also known as: UNO & University of Omaha.

Hierarchical Kohonenen net for anomaly detection in network security

Abstract: A novel multilevel hierarchical Kohonen Net (K-Map) for an intrusion detection system is presented. Each level of the hierarchical map is modeled as a simple winner-take-all K-Map. One significant advantage of this multilevel hierarchical K-Map is its computational efficiency. Unlike other statistical anomaly detection methods such as nearest neighbor approach, K-means clustering or probabilistic analysis that employ distance computation in the feature space to identify the outliers, our approach does not involve costly point-to-point computation in organizing the data into clusters. Another advantage is the reduced network size. We use the classification capability of the K-Map on selected dimensions of data set in detecting anomalies. Randomly selected subsets that contain both attacks and normal records from the KDD Cup 1999 benchmark data are used to train the hierarchical net. We use a confidence measure to label the clusters. Then we use the test set from the same KDD Cup 1999 benchmark to test the hierarchical net. We show that a hierarchical K-Map in which each layer operates on a small subset of the feature space is superior to a single-layer K-Map operating on the whole feature space in detecting a variety of attacks in terms of detection rate as well as false positive rate.

Leadership Behaviors and Subordinate Resilience

Abstract: Utilizing a sample of 150 part-time MBA students, this study evaluated the relationship between leader behaviors and subordinate resilience. We proposed that the transformational leadership dimensions of Attributed Charisma, Idealized Influence, Inspirational Motivation, Intellectual Stimulation, and Individualized Consideration, as well as the transactional leadership dimension of Contingent Reward would be positively associated with subordinate resilience. We also proposed that the transactional leadership dimensions of Management-by-Exception Active and Management-by-Exception Passive and the non-leadership dimension of Laissez-Faire leadership would not be positively associated with subordinate resilience. With the exception of Inspirational Motivation, all hypothesized relationships were supported. A post-hoc analysis of open-ended responses to the question "What helped you to deal with this situation? " indicated that participants who mentioned their leaders as a positive factor in dealing with the ...