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Act I of the Crucible Essay

In perusing the suggestion, before any exchange happens, we are given a little look into the universe of the Salemites. Mill operator talks ...

Saturday, February 29, 2020

Ballistics Essay Example | Topics and Well Written Essays - 750 words

Ballistics - Essay Example A ballistic body is a body which is free to move, behave, and be modified in appearance, contour, or texture by ambient conditions, substances, or forces, as by the pressure of gases in a gun, by rifling in a barrel, by gravity, by temperature, or by air particles. A ballistic missile is a missile designed to operate in accordance with the laws of ballistics. Forensic ballistics involves analysis of bullets and bullet impacts to determine the type. Separately from ballistics information, firearm and tool mark examinations involve analyzing firearm, ammunition, and tool mark evidence in order to establish whether a certain firearm or tool was used in the commission of a crime. [Anthony A. Braga,1 Ph.D. and Glenn L. Pierce,2 Ph.D.] The specifications like Forensic ballistics, the science of analyzing firearm usage in crimes, Internal ballistics, the study of the processes originally accelerating the projectile, for example the passage of a bullet through the barrel of a rifle, Transition ballistics, the study of the projectile's behavior when it leaves the barrel and the pressure behind the projectile is equalized, External ballistics, the study of the passage of the projectile through space or the air, Terminal ballistics, the study of the interaction of a projectile with its target, whether that be flesh (for a hunting bullet), steel (for an anti-tank round), or even furnace slag (for an industrial slag disruptor) [Wikipedia] Ballistics has been used in forensic technology such as ballistic fingerprinting, imaging, etc. Ballistics imaging technology has received tremendous attention as a potent tool for moving the law enforcement response to violent gun criminals forward by linking multiple crime scenes to one firearm.[www.cybersniper.com] Cost-effectiveness estimates and qualitative evidence also suggest that ballistics imaging technology allows law enforcement agencies to make hits that would not have been possible using traditional ballistics methods. Ballistic fingerprinting, a sub-category of firearms examination, is a forensic method that is intended to help find the gun that was used in a crime by matching the bullet's striations (or striae) with the rifled barrel through which it was fired, or by matching marks on the cartridge case to marks in the chamber and breech. The technique is part of the science of forensic ballistics, and it is an application of tool mark identification. [Wikipedia] Newgard discusses the body's blood loss sensory and compensatory mechanisms (venous constriction, increased cardiac output and vascular fluid transfer), and the degree in which these mechanisms respond to, and compensate for, hemorrhagic shock. He reviews clinical tests of human tolerance for blood loss, which "demonstrate that adequate blood pressure can be maintained with minimal symptoms until a 20% blood deficit was reached." [Newgard, Ken, M.D ] Newgard provides the following example: "For an average 70 kg (155 lb.)* male the cardiac output will be 5.5 liters (1.4 gallons) per minute. His blood volume will be 60 ml per kg (0.92 fl. oz. per lb.) or 4200 ml (1.1 gallons). Assuming his cardiac output can double under stress (as his heart beats faster and with greater force). his aortic blood flow can reach 11 liters (2.8 gallons) per minute. If one assumes a wound that totally severs the thoracic aorta, then it would take 4.6 seconds

Wednesday, February 12, 2020

Method and Results Essay Example | Topics and Well Written Essays - 500 words

Method and Results - Essay Example The responses were coded and tabulated. SPSS software was used to store the data ready for analysis. The software could allow correlation of both the categorical and non-categorical variables. Consequently, it was possible for the management team of the Arizona University to find out how different factors related to the students influence the students performance (Creswell, 2008). Participants for the study were SOC 390 and SOC 391/FAS 361 students from Arizona State University. Out of the 180 students enrolled in the survey, only 166 students took part. The demographic questions of participant’s study time, alcohol intake were used in the analysis as independent variables. The amount of time the student spends studying for a typical class each week, which was measured in hours. The dependent variable was a measure of the student’s current GPA. The alcohol use was measured in terms of ratio whereas the GPA was measured in interval level of measurement whereas the time spend studying was measured in ratio (Patton, 2002). The study was based on a hypothesis that there is a positive correlation with studying and a higher GPA while there is a negative correlation with alcohol and students’ GPA. The data was analyzed using regression analysis in order to determine whether the GPA is dependent upon the study time and drinking of alcohol (McSpirit & Jones, 1999). This analysis was performed in order to determine the effects of the study time and alcohol drinking on the GPA. All of the 166 respondents provided answers in each category. The average GPA of student’s respondents was 3.2772 and the standard deviation was 0.51627. The mean of study time and alcohol consumption was 5.70 and 4.671 respectively whereas the standard deviation was 4.670 and 5.8437 respectively. Descriptive analysis was done to show more information on aspects such as variance, skewness, Kurtosis, standard