Performance and Safety to NAVSEA Instruction 9310.1A of Lithium-thionyl Chloride Reserve Batteries

The design, performance and safety of a fully engineered, selfcontained Li/SOCl2 battery as the power source for underwater applications. In addition to meeting the performance standards of the end user this battery is successfully tested under the rigorous safety conditions of NAVSEA Instruction 9310.1A for use on land, aircraft and surface ships

Redundant data management system

Redundant data management system solves problem of operating redundant equipment in real time environment where failures are detected, isolated, and switched in simple manner. System consists of quadruply-redundant computer, input/output control units, and data buses. System inherently contains failure detection, isolation, and switching function

Our very own coral reef crisis

The past decade has seen trawling operations expand along the edge of the North East Atlantic continental shelf, as stocks of shelf-dwelling species such as cod have declined. As a substitute, markets are being developed for very strange-looking deep-water species such as roundnose grenadier (Coryphaenoides rupestris), orange roughy (Hoplostethus atlanticus), black scabbard fish (Aphanopus carbo) and deep-sea sharks (Centrophorus squamosus and Centroscymnus coelolepis). The problem is that this expansion in deep-water fisheries goes on unregulated, and it is causing long-term disturbance to seabed habitats and fish stocks alik

Entropic Heisenberg limits and uncertainty relations from the Holevo information bound

Strong and general entropic and geometric Heisenberg limits are obtained, for estimates of multiparameter unitary displacements in quantum metrology, such as the estimation of a magnetic field from the induced rotation of a probe state in three dimensions. A key ingredient is the Holevo bound on the Shannon mutual information of a quantum communication channel. This leads to a Bayesian bound on performance, in terms of the prior distribution of the displacement and the asymmetry of the input probe state with respect to the displacement group. A geometric measure of performance related to entropy is proposed for general parameter estimation. It is also shown how strong entropic uncertainty relations for mutually unbiased observables, such as number and phase, position and momentum, energy and time, and orthogonal spin-1/2 directions, can be obtained from elementary applications of Holevo's bound. A geometric interpretation of results is emphasised, in terms of the 'volumes' of quantum and classical statistical ensembles.Comment: Submitted to JPA special issue "Shannon's Information Theory 70 years on: applications in classical and quantum physics". v2: shortened, minor corrections and improvement

Six Challenges in Designing Equity-Based Pay

This paper analyzes why the primary goal of the equity-pay explosion--creating long-run ownership incentives for top executives--has often been difficult to achieve in practice. More generally, I describe six challenges in the design of equity-based pay plans and discuss potential solutions. The six challenges involve: 1. mismatched time horizons; 2. gaming; 3. the value-cost wedge'; 4. the leverage-fragility tradeoff; 5. aligning risk-taking incentives; and 6. avoiding excessive compensation. The paper also discussed the merits of stock versus options and concludes that restricted stock is often a superior form of compensation.