Analysis of common errors and methods of calibration of ultrasonic level meter

This article is devoted to improve the accuracy of the measuring system to the analyzing of common errors of an ultrasonic level meter designed to measure the level of liquid materials in tanks. To reduce the random error of the measurement system, appropriate measures and compensation methods are presented. As a result, it was revealed that the generalized cumulative error of the device belongs to the interval G = 1.3 - 2%

Corporate social responsibility and societal governance: lessons from transparency in the oil and gas sector

This article evaluates the potential of the current Corporate Social Responsibility (CSR) agenda for addressing issues related to societal governance. The investigation focuses on the experience of the oil and gas sector, which has been among the leading industry sectors in championing CSR. In particular, the article analyses the issue of revenue transparency, which has been the principal governance challenge addressed by multinational oil and gas companies. The article suggests that (1) tackling governance challenges is crucial to addressing the impact of corporate activities; (2) current CSR and policy initiatives are entirely insufficient in addressing governance challenges and (3) corporate activities may be contributing to governance failures

Synthesis and properties of symmetric and unsymmetric dibenzothienopyrroles

10.1021/ol901133mOrganic Letters11153358-336