conclusions the results of this study led to the identification of many of the errors and conditions that affect the performance of controllers, providing the ability to define safety and ergonomic interventions to reduce the risk of human error. therefore, the results of this study can be a basis for planning atm to prioritize prevention programs and safety enhancement results the analysis of ...

Abstract. The development and validation of management practices to mitigate greenhouse gas (GHG) emissions from livestock require accurate emission measurements. This study assessed the accuracy a practical inverse dispersion modelling (IDM) technique quantify methane (CH4) emitted small cattle herd (16 animals) confined 63 m × 60 experimental pen. IDM calculates increase in CH4 concentration ...

Given increased interest by all stakeholders to better understand the contribution of animal agriculture to climate change, it is important that appropriate methodologies be used when measuring greenhouse gas (GHG) emissions from animal agriculture. Similarly, a fundamental understanding of the differences between methods is necessary to appropriately compare data collected using different appr...

UNLABELLED The topographic matching of alveolar ventilation (V(A)) and perfusion (Q) is the main determinant of gas exchange efficiency of the lung. However, no pulmonary functional imaging technique has been shown to predict whole-lung gas exchange in health and disease. This study aims to present a PET-based method to estimate regional alveolar ventilation-to-perfusion ratios (V(A)/Q) predict...

The relative contribution of the pulmonary and bronchial circulatory systems to heat and water exchange in normal lungs was evaluated in 20 isolated, in situ perfused dog lungs and in four patients undergoing elective cardiopulmonary bypass. In isolated dog lungs, if the pulmonary artery was perfused at a nominal flow rate (0.5 l/min), bronchial artery perfusion (up to 70 ml/min) did not signif...

we present a 55-year old male patient who was subjected to whole body skeletal scintigraphy for metastatic work up of urinary bladder cancer. whole body 99mtc-methylene diphosphonate (mdp) skeletal scintigraphy was performed. that revealed no skeletal metastasis in the entire body skeleton and normally visualized left kidney with empty right renal fossa. additionally tracer activity collected i...

While unphysiologically large cholesterol doses are known to reduce percent cholesterol absorption, smaller amounts are reported to have no effect in human subjects. To determine the dose;-response relation between dietary cholesterol consumed and the efficiency of intestinal cholesterol absorption, we fed 18 normal subjects two test meals containing different amounts of natural cholesterol. In...

Labeling groundwater by injecting an artificial tracer is a standard and widely used method to study flow systems. Noble gases dissolved in are potentially ideal tracers, as they not subject biogeochemical transformations, do adsorb onto the aquifer matrix, colorless, have no negative impact on quality of resources. In addition, combining different noble-gas species multi-tracer tests would all...

Understanding the mixing between surface water and groundwater as well travel times in vulnerable aquifers is crucial to sustaining a safe supply. Age dating tracers used infer apparent typically refer entire sample. A sample, however, consists of mixture waters with distribution times. only reflect proportion that under range tracer, thus their interpretation biased. Additionally, end-member m...

The TRACER instrument (Transition Radiation Array for Cosmic Energetic Radiation) is designed to measure the individual energy spectra of cosmic ray nuclei in long duration balloon flights. The large geometric factor of TRACER (5 m 2 sr) permits statistically significant measurements at particle energies well beyond 10 14 eV. TRACER identifies individual cosmic ray nuclei with single element re...