President\u27s Forum

This issue marks the fiftieth anniversary of the Naval War College Review. Soon after the Second World War, Admiral Raymond Spruance, who was then President of the College, responded to a suggestion from the Chief of Naval Personnel and initiated the Information Service for Officers. Published each month during the College\u27s academic year, these small journals contained three or four lectures which had been given at the College, so that officers who were not in Newport might benefit from the activities conducted here

President\u27s Notes

Luce and Alfred Thayer Mahan wrote within the pages of the U.S. Naval Institute Proceedings that a place was needed in which naval officers could study the higher aspects of their profession. The need for such study was being driven by the increasingly complex nature of naval warfare as the service embraced such technologies as steam power, long-range weapons, and wireless communications. Luce and Mahan advocated the establishment of a college of naval war, and in 1884 their dream was realized when our institution first opened its doors on the shores of Narragansett Bay

President\u27s Notes

On 1 March 1946, one of the most capable and celebrated commanders of the Second World War became President of the Naval War College. Admiral Raymond Spruance, as the victor of Midway and successful commander of the Fifth Fleet in the Central Pacific campaigns, could have had the pick of nearly any assignment he wanted. Among all those possibilities, his first choice was to return to the Naval War College, where he had been a student in 1926-27, and had twice served as a faculty member during the 1930s. By returning to the College, Admiral Spruance firmly believed that he could make his most enduring, long-term contribution to the Navy\u27s future

President\u27s Notes

As the New President of the Naval War College, I have found the past several months to be an exciting mixture of hard work to catch up on all the activities here and profound admiration for the accomplishments of this wonderful institution. Previous to this new assignment, I spent an extremely rewarding year as Commander of Nato\u27s Standing Naval Force Atlantic. In a radical departure from much of that force\u27s previous experience, we spent our entire time in the Adriatic Sea enforcing the UN embargo of arms against the warring parties of what used to be known as Yugoslavia

Lubricant degradation, transport and the effect of extended oil drain intervals on piston assembly tribology

There are ever increasing demands on lubricant manufacturers to meet governmental legislation and customer needs by improving fuel economy, engine durability and exhaust system compatibility as shown by the introduction of GF4 and move towards GF5 specification oils. This has created an ever increasing need to understand how oil degrades in an engine and how this degraded oil affects piston assembly tribology. This review conference paper will give an overview of a collaborative project that has been undertaken to further enhance the understanding of how lubricant degrades in an operating engine, its transport through the engine and effect upon piston assembly tribology

Extraction and tribological investigation of top piston ring zone oil from a gasoline engine

With tightening emission regulations, increased expected fuel economy, and longer drain intervals impacting on lubricant formulation, greater understanding of how oil degrades in an automotive engine is becoming ever more important. Equally significant is the effect that this degraded lubricant has on the tribological operation of the engine, particularly its overall internal friction and component wear. In a previous paper, four tests to degrade oil in a single cylinder engine were reported [1]. These tests were set up such that the lubricating oil was degraded in the ring pack before returning to the sump, where it was sampled and chemical and rheological analysis undertaken. This paper reports the extension of this work using the same Hydra engine and describes how oil has additionally been extracted from the rear of the top piston ring during engine operation. This extracted oil has then been subjected to similar analysis as the sump oil samples in the previous tests, along with additional analysis to look at the tribological properties of the oil using tribometers. The results clearly show significant differences in the rheological, tribological, and chemical properties of the fresh oil and used sump oil samples when compared with the top ring zone (TRZ) oil samples, particularly the effect of load on the levels of volatiles present in the TRZ samples and their effect on traction and friction coefficient values during tribological testing

New allowed mSUGRA parameter space from variations of the trilinear scalar coupling A0

In minimal Supergravity (mSUGRA) models the lightest supersymmetric particle (assumed to be the lightest neutralino) provides an excellent cold dark matter (CDM) candidate. The supersymmetric parameter space is significantly reduced, if the limits on the CDM relic density, obtained from WMAP data, are used. Assuming a vanishing trilinear scalar coupling A0 and fixed values of tan(beta), these limits result in narrow lines of allowed regions in the m0-m1/2 plane, the so called WMAP strips. In this analysis the trilinear coupling A0 has been varied within +/-4 TeV. A fixed non vanishing A0 value leads to a shift of the WMAP strips in the m0-m1/2 plane.Comment: Typos corrected, Fig.1. updated, references adde

Modular Synthesis of Sketches Using Models

One problem with the constraint-based approaches to synthesis that have become popular over the last few years is that they only scale to relatively small routines, on the order of a few dozen lines of code. This paper presents a mechanism for modular reasoning that allows us to break larger synthesis problems into small manageable pieces. The approach builds on previous work in the verification community of using high-level specifications and partially interpreted functions (we call them models) in place of more complex pieces of code in order to make the analysis modular. The main contribution of this paper is to show how to combine these techniques with the counterexample guided synthesis approaches used to efficiently solve synthesis problems. Specifically, we show two new algorithms; one to efficiently synthesize functions that use models, and another one to synthesize functions while ensuring that the behavior of the resulting function will be in the set of behaviors allowed by the model. We have implemented our approach on top of the open-source Sketch synthesis system, and we demonstrate its effectiveness on several Sketch benchmark problems.National Science Foundation (U.S.) (Grant NSF-1116362)National Science Foundation (U.S.) (Grant NSF-1139056)United States. Dept. of Energy (Grant DE-SC0005372

HIGH-RESOLUTION SPECTROSCOPY OF THE A1Π(v′=0-10)−X1Σ+(v′′=0) BANDS IN 13C18O

Laboratory astrophysics and astrochemistr