918 resultados para Amphibious assault ships


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Item 1005-C

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The negotiations over Russia’s purchase of French Mistral-class multipurpose assault ships, which were intensified in 2010, have gained a significant political dimension. The prospects of such a spectacular acquisition of large and expensive assault ships from one of NATO’s member states are being used by Russia to demonstrate that it has opened a new stage of relations with Western Europe. Paris has welcomed Russia’s desire to embark on military cooperation; for France, the Mistral deal has become a convenient tool to prove that relations with Russia are becoming increasingly normal, and that Russia poses no threat to the European security.

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A landing craft tank (or LCT, an amphibious assault vehicle) unloading equipment on Beach Yellow 2, on the southeastern side of Iwo Jima. Caption; "LCT unloading at beach YELLOW 2."

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"An alphabetical arrangement of the ships of the Continental and United States Navies, with a historical sketch of each one."

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The cost of a new ship design heavily depends on the principal dimensions of the ship; however, dimensions minimization often conflicts with the minimum oil outflow (in the event of an accidental spill). This study demonstrates one rational methodology for selecting the optimal dimensions and coefficients of form of tankers via the use of a genetic algorithm. Therein, a multi-objective optimization problem was formulated by using two objective attributes in the evaluation of each design, specifically, total cost and mean oil outflow. In addition, a procedure that can be used to balance the designs in terms of weight and useful space is proposed. A genetic algorithm was implemented to search for optimal design parameters and to identify the nondominated Pareto frontier. At the end of this study, three real ships are used as case studies. [DOI:10.1115/1.4002740]

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This article presents the findings from a secondary analysis of the 1991 Queensland Crime Victim Survey. Although now more than 10 years old, this survey still has validity as it remains the largest of its kind conducted in Queensland, and it is a rich source of information about the experiences of victims of violence. The study investigated how the experiences of younger female assault victims differ from older female victims in terms of their relationship with their aggressor and the assault location. The following factors were examined: whether or not the assault occurred (a) at the hands of a partner or former partner, (b) in a private dwelling, (c) in a public place, and (d) in a leisure venue away from home. Results pointed to important differences between younger and older women in terms of their experiences of violence. Teenage women reported significantly more assaults in public places compared with older women, and were less likely to be assaulted in their own dwelling. Also, trends in the data suggested that compared to older women, teenage women were more likely to be assaulted in leisure venues away from home, and were less likely to be assaulted by partners or former partners. Considering that young women are at a much higher risk than older women of being assaulted, consideration of these age differences may be helpful in the design of violence prevention strategies. In particular, more attention should be paid to the public place prevention of violence against young women.

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Objective: To determine the number of assault-related admissions to hospital in the Central Australia region of the Northern Territory over a six-year period. Design and setting: Retrospective analysis of all patients admitted to Alice Springs Hospital (ASH) and Tennant Creek Hospital (TCH) from July 1995 to June 2001, where the primary cause of injury was assault. Main outcome measures: Frequency of assault-related admission to hospital; demographic characteristics of the victims. Results: in the six years, there were 2449 assault-related admissions to ASH and 545 to TCH. Adults aged 25-34 years were most frequently hospitalised for assault, in a proportion greater than their proportion in the NT population, Females represented 59.7% of people admitted to ASH and 54.7% to TCH, greater than their proportion in the NT population. Aboriginals comprised 95.2% of ASH and 89.0% of TCH admissions, and were admitted in a significantly greater proportion than their proportion in the NT population (P < 0.001). The age-adjusted hospital admission rate resulting from assault has increased (P = 0.002) at an average rate of 1.6 (SE, 0.2) per 10 000 people per year. The proportion of assault-related admissions associated with alcohol has also increased significantly (P < 0.001). Conclusion: The frequency of assault-related admissions to hospital, especially among the Aboriginal population, suggests that this major public health issue is escalating.

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A new algorithm for the velocity vector estimation of moving ships using Single Look Complex (SLC) SAR data in strip map acquisition mode is proposed. The algorithm exploits both amplitude and phase information of the Doppler decompressed data spectrum, with the aim to estimate both the azimuth antenna pattern and the backscattering coefficient as function of the look angle. The antenna pattern estimation provides information about the target velocity; the backscattering coefficient can be used for vessel classification. The range velocity is retrieved in the slow time frequency domain by estimating the antenna pattern effects induced by the target motion, while the azimuth velocity is calculated by the estimated range velocity and the ship orientation. Finally, the algorithm is tested on simulated SAR SLC data.

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In 2006, a medico-legal consultation service devoted to adult victims of interpersonal violence was set up at the Lausanne University Hospital Centre, Switzerland: the Violence Medical Unit. Most patients are referred to the consultation by the Emergency Department. They are received by forensic nurses for support, forensic examination (in order to establish medical report) and community orientation. Between 2007 and 2009, among community violence, aggressions by security agents of nightclubs on clients have increased from 6% to 10%. Most of the victims are young men who had drunk alcohol before the assault. 25.7% presented one or several fractures, all of them in the head area. These findings raise questions about the ability of security agents of nightclubs to deal adequately with obviously risky situations and ensure client security.