The Barometer

In further consideration of the tenet set forth in the New Horizons article in the November 1969 issue of Naval War College Review, three problems antithetical to A Concept for Carrier Air Capability in the Standing Naval Force Atlantic (SNFL) are brought to mind

Set & Drift: A Contemporary Political Dilemma: The Impact of Intelligence Operations on Foreign Policy

In the affairs of politically organized mankind, there is a ladder of actions which commences with variegated, often amorphous qualities that have come to be called national interests

The Soviet Union and the Southern Sea Route

At least since 1946, there has been a strong, persistent impression in the United States that the keys to under­standing Soviet interests in Southwest Asia are linked to oil and the ability to regulate or deny that oil to other nations. 1 The Russians also are widely held to be intent on acquiring a warm water port, that is, a year-around port, on the Indian Ocean,

Future intercontinental and Theater Missile Systems

Two perspectives in the continuing development of theater and intercontinental weapon systems in the United States and the Soviet Union may soon converge. One is represented by the ascendancy and dominance of highly accurate, sea-launched, ballistic missiles (SLBM); the other by the ascendancy and dominance of a mixture of long-range cruise missiles (CM), medium-range ballistic missiles (MRBM), and small intercontinental ballistic missiles (SICBM)

Soviet Reaction to the U.S. Maritme Strategy

The question of the Soviet Union\u27s reaction to the U.S. Maritime Strategy is an intriguing one. Divining how the Soviets view that strategy and how they prepare themselves to respond to it, both in peace and in war, should be an important component of the Maritime Strategy itself. If for no other reason, this question is important because of the oft­voiced proposition that, given nominal equivalency in military firepower, the superior strategy usually wins superiority in war has its roots in the quality and scope of military thought

The Soviet Union and the Southern Sea Route

At least since 1946, there has been a strong, persistent impression in the United States that the keys to under­standing Soviet interests in Southwest Asia are linked to oil and the ability to regulate or deny that oil to other nations. 1 The Russians also are widely held to be intent on acquiring a warm water port, that is, a year-around port, on the Indian Ocean,

Methods for suspensions of passive and active filaments

Flexible filaments and fibres are essential components of important complex fluids that appear in many biological and industrial settings. Direct simulations of these systems that capture the motion and deformation of many immersed filaments in suspension remain a formidable computational challenge due to the complex, coupled fluid--structure interactions of all filaments, the numerical stiffness associated with filament bending, and the various constraints that must be maintained as the filaments deform. In this paper, we address these challenges by describing filament kinematics using quaternions to resolve both bending and twisting, applying implicit time-integration to alleviate numerical stiffness, and using quasi-Newton methods to obtain solutions to the resulting system of nonlinear equations. In particular, we employ geometric time integration to ensure that the quaternions remain unit as the filaments move. We also show that our framework can be used with a variety of models and methods, including matrix-free fast methods, that resolve low Reynolds number hydrodynamic interactions. We provide a series of tests and example simulations to demonstrate the performance and possible applications of our method. Finally, we provide a link to a MATLAB/Octave implementation of our framework that can be used to learn more about our approach and as a tool for filament simulation