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result(s) for
"Machine guns"
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Gun : a visual history
Offers a detailed study of more than three hundred different guns, including information on their date, origin, weight, barrel length, and caliber, in an informative history that looks at how guns were and are made and profiles the world's leading gun manufacturers.
Book
Vibration Behavior Analysis of the Ammunition Belt of the Gas-Operated Machine Gun
Purpose
The paper’s aim is to use the dynamic theory of multi-rigid body systems to establish a dynamic model of the ammunition belt for the gas-operated machine gun. Then, an experimental study is also carried out on the PKMS Kalashnikov 7.62 mm machine gun to verify the reliability of the proposed model.
Method
A multi-body mechanical model for dynamic analysis of the ammunition belt is proposed to serve as a foundation for the theoretical calculation problem. In addition, a set of experimental procedures for the PKMS Kalashnikov 7.62 mm machine gun is carried out dynamic analysis problem.
Results
The calculation results are compared with the experimental results, including the motion, displacement, and velocity of the ammunition belt and the interaction force between two link joints to confirm the suitability of the proposed model. From here, it can be asserted that our model is an effective one and should be encouraged in research into the dynamics of the automatic machine and the design of the gas-operated machine gun.
Journal Article
The gun
The author, a New York Times reporter, traces the invention and mass distribution of the AK-47 assault rifle, and its effects on war. He traces the invention of the assault rifle, following the miniaturization of rapid-fire arms from the American Civil War, through World War I and Vietnam, to present-day Afghanistan, where Kalashnikovs and their knockoffs number as many as 100 million, one for every seventy persons on earth. It is the weapon of state repression, as well as revolution, civil war, genocide, drug wars, and religious wars; and it is the arms of terrorists, guerrillas, boy soldiers, and thugs. From its inception to its use by more than fifty national armies around the world, to its role in modern-day Afghanistan, he discusses how the deadly weapon has helped alter world history.
Book
Book of the Machine Gun 1917
This book is a very important text for any student of the development of the machine gun, and contains details of the history of this weapon from its inception to the mid-ppoint of the First World War. The evolution of the machine gun is detailed, followed by examples of the use of the wepon in war, and particularly in the Russo-Japanese War.Tactics are examined in detail, both from the historical point of view and tactics of the First World War, an important part of the book. Training is covered, particularly from the British Army side, and the relevant chapter has much of great value in it.Perhaps the most important part of the book however is the examination of the machine guns of the armies then at war. There is in addition a complete chapter on machine guns in the German Army, which is of specific importance to any study of the tactics on the western front.The book is illustrated with a series of good photographs and a number of line drawings of both early and current machine guns, and there is also a large scale drawing of the Vickers gun.
eBook
Evaluation of heritability and genotype effects of resistance to reniform nematode recombinant inbred line population derived from MT2468 Ren1
Cotton is the primary source of natural fiber in the world. In the United States, more than 95% of cotton produced is of the Upland type (Gossypium hirsutum L.). The reniform nematode (Rotylenchulus reniformis Linford & Oliveira) is a leading pathogen of Upland cotton that causes significant annual yield losses. Developing Upland cultivars with improved resistance to R. reniformis would be the most economical and sustainable approach to minimize the impact of this pathogen, but more genetic information is needed about resistance to R. reniformis. Genetic association mapping studies are an affordable and efficient approach to identify genetic loci associated with R. reniformis resistance traits. However, a crucial component of association mapping is the evaluation of trait heritability and to unbiasedly predict genotypic values/effects for a large mapping population whose members, in many instances, cannot be phenotyped simultaneously. In this study, we employed an incomplete block design to evaluate R. reniformis resistance traits of 126 recombinant inbred lines (RILs) derived from the cross M240 RNR (susceptible) x MT2468 Ren1 (resistant). The three representative resistance traits were nematode eggs g.sup.-1 root (EGR), nematode eggs plant.sup.-1 (EPLNT), and nematode reproductive factor (RF). We applied a linear mixed model approach to estimating variance components including heritability and to predicting genotypic effects for all RILs and the parents. The results showed that the group effects equivalent to block effects were significant. The heritability based on four replications for single measurement of EGR, EPLNT, and RF was 82.1%, 78.8%, and 79.9%, respectively. The predicted genotypic effects showed a wider range compared to the parents for all three traits and these predicted genotypic effects were positively skewed, suggesting the possibility that at least two loci mediate R. reniformis resistance in MT2468 Ren1 in an as yet unknown fashion. The results of the present study provide a foundation for future identification of SNPs associated with these R. reniformis resistance traits in MT2468 Ren1.
Journal Article
The Pennsylvania Military Museum's Six-Ton M1917: A Unique Example of America's First Modern Tank
This article examines the history and significance of the World War I-era American six-ton M1917 Tank through the one-of-a-kind example of this rare artifact owned by the Pennsylvania Military Museum in Boalsburg, Pennsylvania.
Journal Article
Does the Bureau of Alcohol, Tobacco, and Firearms Have Authority to Regulate Bump Stocks as \Machineguns\ Under Federal Law?
CASE AT A GLANCE Federal law makes it a crime to possess a \"machinegun.\" 18 U.S.C. [section] 922(o)(1). Federal law then defines \"machinegun\" as \"any weapon which shoots, is designed to shoot, or can be readily restored to shoot, automatically more than one shot, without manual reloading, by a single function of the trigger.\" 26 U.S.C. [section] 5845(b).
Journal Article