<p>This paper examines the effect of a target's acceleration on the Fire Control System (FCS) α-β tracking filters used on the AEGIS cruisers. A single inbound target model was used to test the response of the tracking filter to an accelerating target. This target would begin to approach the AEGIS cruiser from a variety of distances ranging from 40,00 yards to 200,000 yards. The target model would begin its approach starting with an initial velocity of 200 yards/sec. and after a preselected time, the target would undergo an acceleration for a tin1e duration of 5 seconds. The target's acceleration ranges from 1 g to 6g's. For target's acceleration of 1g or greater, the difference between the actual and filtered velocity increases linearly with increasing acceleration and is fairly independent of range and the noise present in the measurement data. For target's acceleration less than 1g, the difference between the actual and filtered velocity is a strong function of acceleration, noise and range. / Master of Engineering

The main purpose was describe the issue of shooting success rate at high altitude (1 500 - 3 000m a. s. l.). Shooting success rate of elite racers was evaluated using analysation of results from individual races at high altitude in the period 1990/1991 - 2013/2014. High altitude had no statistical effect (p<0,05) on shooting success rate of women and men biathletes in the comparision with lowland but it had more negative effect to women shooting success rate than men shooting success rate. Ten national level biathletes were tested in three tests in lowland, four tests at high altitude and five tests in lowland after the return from high altitude. The test included rest shooting in the prone and standing positions and load shooting in both positions which took part of three kilometers running. Twelve days training camp at high altitude did not improve shooting success rate, shooting velocity and running time in the determinated heart rate. Rest shooting and shooting in the prone position did not change statistically during the whole testing period. At high altitude critical days were registered in load shooting in standing position (6th day, p<0,05) and average running time (9th day, p<0,05). Rifle manipulation and shooting are automate motions which are not influenced by high altitude. Most...

The problem investigated was the effect of various methods of conceptual, physical, and conceptual-physical practice procedures upon performance of the basketball motor skill of foul shooting. The sub-problem under investigation was the effect of self-concept upon the performance of foul shooting.

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Body armor designs that limit the range-of-motion required for vital law enforcement tasks, such as shooting may be dangerous. Therefore, a posture based biomechanical analysis was performed to determine if upper body joint angles can be used to assess the effects of armor designs on assumed shooting. Participants (n=8) completed a battery of simulated duty tasks for three armor configurations (no armor, concealable, and tactical armor) while motion capture was used to compute included joint angles of the upper extremity and neck. In general, joint angles were impacted by armor configuration, and law enforcement experience (measured in years) significantly impacted their shooting posture. It was also found that the types of tasks performed interacted with shooting stance. This research is a first step at developing a method to analyze body armor designs and their impact on wearers, so that mobility may not need to be sacrificed for additional protective coverage.

The main purpose was describe the issue of shooting success rate at high altitude (1 500 - 3 000m a. s. l.). Shooting success rate of elite racers was evaluated using analysation of results from individual races at high altitude in the period 1990/1991 - 2013/2014. High altitude had no statistical effect (p<0,05) on shooting success rate of women and men biathletes in the comparision with lowland but it had more negative effect to women shooting success rate than men shooting success rate. Ten national level biathletes were tested in three tests in lowland, four tests at high altitude and five tests in lowland after the return from high altitude. The test included rest shooting in the prone and standing positions and load shooting in both positions which took part of three kilometers running. Twelve days training camp at high altitude did not improve shooting success rate, shooting velocity and running time in the determinated heart rate. Rest shooting and shooting in the prone position did not change statistically during the whole testing period. At high altitude critical days were registered in load shooting in standing position (6th day, p<0,05) and average running time (9th day, p<0,05). Rifle manipulation and shooting are automate motions which are not influenced by high altitude. Most...

No description available.

No description available.

The diagnosis of Complicated Grief (CG) is being proposed for inclusion in DSM–5. As such, it has been the focus of several studies purporting to build evidence of its validity and its conceptual and statistical distinction from Posttraumatic Stress Disorder (PTSD) and depression (Bonanno et al., 2007; Golden & Dalgleish, 2010; Prigerson et al., 1995b). However, previous research has focused predominantly on bereavement caused by non-violent means (e.g., prolonged terminal illness). This study attempts to explore the nature of CG among a sample of students who survived a mass shooting. Exploratory and confirmatory factor analytic procedures were used to examine and confirm the factor structure of CG as reported in previous studies (e.g., Boelen & van den Bout, 2005; Dillen, Fontaine, & Verhofstadt-Denève, 2008). A refined CG scale was then used as a criterion to demonstrate how different types of traumatic exposure contribute to symptoms of CG and/or posttraumatic stress (PTS). It was hypothesized that exposure items related to bereavement would be more related to CG than to PTS, whereas direct exposure to the shootings would be more closely related to PTS than to CG. Results of exploratory and confirmatory factor analyses supported CG as a unitary construct distinct from PTS and from anxiety/depression. Logistic regression results demonstrated that bereavement status was significantly predicted by CG but not PTS: Participants who scored 1 standard deviation above the mean on the CG scale were 14.64 times more likely to have been bereaved than were those who scored at the mean. SEM analyses were used to provide an additional test of this hypothesis. The final model had acceptable fit as assessed by RMSEA = .046, CI = .043–.049, SRMR = .048, and CFI = .990; however, the Satorra-Bentler Scaled Ï 2 = 1507.82, df = 589, p < .001, did not support the model. Overall, results of SEM suggested that interpersonal loss (i.e., whether a friend was killed, injured, or escaped from the shootings) predicted CG but not PTS, whereas perceived threat predicted both CG and PTS. / Ph. D.

A detailed study has been made of the distribution of lead on a public shotgun range in the George Washington-Jefferson National Forests in southwestern Virginia. Sampling of more than 100 sites has yielded data on the distribution pattern of the lead shot. Since opening in 1993 through 2000, 11.1 metric tons of lead has accumulated over an area 220 by 300 m (66,000 m2) with an average rate of accumulation of 1.4 metric tons per year. More than 85 % of the total dispersed lead lies scattered in the forest that surrounds the approximately 60 by 60 m cleared shooting surface. Lead is irregularly distributed because of the use of stationary targets and the general trajectory of launched clay targets. Maximum concentrations occur at distances of about 28 m about 80 m, and at about 180 m reach a maximum value of more than 5000 g per m2. Significant amounts of fine particulate lead, generated during shooting and as a result of impact occur close to the shooting box but absent at distances beyond 50 m. / Master of Science