Electromagnetic Wave Sensor For Seabed Logging Using The Fluxgate Technology

Designing and manufacturing detectors used for deepwater oil and gas exploration can be very challenging. Detectors used for this purpose; need to have great accuracy and reliability in detecting extremely low frequency EM signals (as low as I kHz). Often these Electromagnetic (EM) waves to be detected have a diminished capacity (poor signal to noise ratio/ SNR) due to the very long depth (more than 2500m) they travel beneath the seafloor to reach the potential hydrocarbon reservoir

A non-intrusive method for estimating motor efficiency using vibration signature analysis

An accurate method of estimating the efficiency of in-service motors is needed in order to determine the performance of installed motors without disrupting the motor driven process. In this paper, the motor efficiency is estimated using a non-intrusive implementation of the compensated slip method. The motor speed is accurately estimated using motor vibration signature analysis. A few other efficiency estimation techniques are implemented and their performance is compared to the proposed method. It was found that the non-intrusive compensated slip method produced relatively accurate results without having an adverse impact on the availability of the motor under test. This method provides an attractive alternative to highly intrusive techniques that offer similar accuracy.http://www.elsevier.com/locate/ijepeshb201

A motor management strategy for optimising energy use and reducing life cycle costs

With increasing energy costs and renewed focus on using energy in ways that support the environment, a structured approach is required to ensure that energy is used efficiently. A comprehensive motor management strategy to reduce motor life cycle costs while increasing reliability is presented. The application of energy management principles is combined with benefits that can be obtained from using energy-efficiency motors. An economic model for determining the optimal time a motor should be replaced with a higher efficiency motor is proposed. The strategy presented incorporates benefits that can be obtained from using in-situ motor efficiency estimation and condition monitoring techniques as part of a motor management system.http://www.scirp.org/journal/jpeeam201

Risk factors for Coronavirus disease 2019 (Covid-19) death in a population cohort study from the Western Cape province, South Africa

Risk factors for coronavirus disease 2019 (COVID-19) death in sub-Saharan Africa and the effects of human immunodeficiency virus (HIV) and tuberculosis on COVID-19 outcomes are unknown. We conducted a population cohort study using linked data from adults attending public-sector health facilities in the Western Cape, South Africa. We used Cox proportional hazards models, adjusted for age, sex, location, and comorbidities, to examine the associations between HIV, tuberculosis, and COVID-19 death from 1 March to 9 June 2020 among (1) public-sector “active patients” (≥1 visit in the 3 years before March 2020); (2) laboratory-diagnosed COVID-19 cases; and (3) hospitalized COVID-19 cases. We calculated the standardized mortality ratio (SMR) for COVID-19, comparing adults living with and without HIV using modeled population estimates.Among 3 460 932 patients (16% living with HIV), 22 308 were diagnosed with COVID-19, of whom 625 died. COVID19 death was associated with male sex, increasing age, diabetes, hypertension, and chronic kidney disease. HIV was associated with COVID-19 mortality (adjusted hazard ratio [aHR], 2.14; 95% confidence interval [CI], 1.70–2.70), with similar risks across strata of viral loads and immunosuppression. Current and previous diagnoses of tuberculosis were associated with COVID-19 death (aHR, 2.70 [95% CI, 1.81–4.04] and 1.51 [95% CI, 1.18–1.93], respectively). The SMR for COVID-19 death associated with HIV was 2.39 (95% CI, 1.96–2.86); population attributable fraction 8.5% (95% CI, 6.1–11.1)

Analysis of an enterprise resource planning (ERP) implementation at Iliad Africa (Pty) Ltd.

M. Tech. Business AdministrationAn Enterprise Resource Planning system is complex software that ties together and automates the processes in a business. The benefits of having an Enterprise Resource Planning system included having a single database that allowed the data to be available across all business units. Small, Medium Enterprises, and Large South African companies, have introduced Enterprise Resource Planning (ERP) systems as a means of improving productivity and efficiency over the past few years. Various South African companies have experienced difficulties in the implementation of Enterprise Resource Planning systems because they are costly in terms of finance and time. This study aims to analyse the degree to which the South African company Iliad Africa has benefited from the implementation of an ERP system

A Motor Management Strategy for Optimising Energy Use and Reducing Life Cycle Costs

With increasing energy costs and renewed focus on using energy in ways that support the environment, a structured approach is required to ensure that energy is used efficiently. A comprehensive motor management strategy to reduce motor life cycle costs while increasing reliability is presented. The application of energy management principles is combined with benefits that can be obtained from using energy-efficiency motors. An economic model for determining the optimal time a motor should be replaced with a higher efficiency motor is proposed. The strategy presented incorporates benefits that can be obtained from using in-situ motor efficiency estimation and condition monitoring techniques as part of a motor management system.http://www.scirp.org/journal/jpeeam201