Concept for sleeve induction motor with 1-msec mechanical time constant

Conductive sleeve induction motor having a 1-msec mechanical time constant is used with solid-state devices to control all-electric servo power systems. The servomotor rotor inertia is small compared to the maximum force rating of the servo motion, permitting high no-load acceleration

Improving the monitoring and evaluation of schistosomiasis by determining appropriate targets and utilizing new technologies

The World Health Organization’s framework for the assessment of schistosomiasis morbidity control utilizes the prevalence of heavy-intensity infections in a homogenous ecological zone. The foundational research for the use of heavy-intensity infections is at least 30 years old. Research since then has illuminated the relationship between Schistosoma infection and all morbidity. In addition, severe, chronic, schistosomiasis morbidity is less common due to increasing dissemination of preventive chemotherapy. There are calls for improvements to the monitoring and evaluation framework, especially relating to the measurement of schistosomiasis morbidity. The focus of this thesis was to improve the schistosomiasis monitoring and evaluation framework by evaluating whether those current infection measures are linked to morbidity indicators. For those measures linked to indicators, an attempt was made to calculate programmatic targets linked to morbidity using robust methods. Targets based on microhaematuria prevalence were calculated based on community-level S. haematobium prevalence. For S. mansoni, associations between infection and morbidity were much weaker and it appears unlikely that a reliable target can be found. S. mansoni morbidity control may require changes to accurately measure the S. mansoni morbidity burden in a geographic area. Incorporating new technologies, such as portable, tablet-based ultrasound systems, may allow researchers and control programs to collect schistosomiasis morbidity indicators

RascalC: A Jackknife Approach to Estimating Single and Multi-Tracer Galaxy Covariance Matrices

To make use of clustering statistics from large cosmological surveys, accurate and precise covariance matrices are needed. We present a new code to estimate large scale galaxy two-point correlation function (2PCF) covariances in arbitrary survey geometries that, due to new sampling techniques, runs $\sim 10^4$ times faster than previous codes, computing finely-binned covariance matrices with negligible noise in less than 100 CPU-hours. As in previous works, non-Gaussianity is approximated via a small rescaling of shot-noise in the theoretical model, calibrated by comparing jackknife survey covariances to an associated jackknife model. The flexible code, RascalC, has been publicly released, and automatically takes care of all necessary pre- and post-processing, requiring only a single input dataset (without a prior 2PCF model). Deviations between large scale model covariances from a mock survey and those from a large suite of mocks are found to be be indistinguishable from noise. In addition, the choice of input mock are shown to be irrelevant for desired noise levels below $\sim 10^5$ mocks. Coupled with its generalization to multi-tracer data-sets, this shows the algorithm to be an excellent tool for analysis, reducing the need for large numbers of mock simulations to be computed.Comment: 29 pages, 8 figures. Accepted by MNRAS. Code is available at http://github.com/oliverphilcox/RascalC with documentation at http://rascalc.readthedocs.io

Using Intelligent Agents to Manage Business Processes

This paper describes work undertaken in the ADEPT (Advanced Decision Environment for Process Tasks) project towards developing an agent-based infrastructure for managing business processes. We describe how the key technology of negotiating, service providing, autonomous agents was realised and demonstrate how this was applied to the BT business process of providing a customer quote for network services

Experiments on the Effect of Atomic Electrons on the Decay Constant of Be7

A comparison of the decay constants of Be{sup 7} in beryllium oxide and in beryllium fluoride has given {lambda}{sub BeO}-{lambda}{sub BeF{sub 2}} = (+1.375 {+-} 0.053)10{sup -3}{lambda}{sub BeO} thus showing a definite effect of the chemical binding on the radioactive decay constant