Advances in Engineering

Advances in Engineering Features : Analysis of UV Photographs of the Shroud of Turin

The Shroud of Turin is a length of linen cloth bearing the negative image of a crucified man on it. Many believe that this cloth is Christ's burial shroud consequently, attracting much research from both historians and scientists. As a result, it has become one of the most studied relics in all of history. To date, the specific time in history when the Shroud was used is still a contentious issue as various research groups have placed it in different time periods. For instance, one study radiocarbon dated the Shroud to have originated between 1260-1390, while a more recent study using more advanced techniques dated the shroud to between 200 BC and 372AD – the time of Jesus Christ. Even though there are valid statistical questions about the radiocarbon dating results, the very large discrepancy between the medieval radiocarbon dates and the first century appears very likely to be due to some other cause than contamination hence calling for further studies.

Advances in Engineering Feature: Audible Thumping from Wind Farms Can Travel Up to 3.5 Km

Technically, wind energy is a form of solar energy. Consequently, it is renewable and can be used to generate electricity; this knowledge has been exploited greatly, particularly in the past decade where many wind farms have been installed in different regions worldwide. Wind farms are comprised of numerous large wind turbines that rotate, and the generated motion is transferred to a generator that in turn converts the kinetic energy to electric energy. So far, the process seems flawless; unfortunately, reports from residents of areas surrounding the wind farm have raised complaints regarding noise pollution generated by the turbines. More specifically, the motion of the large blades and mechanical parts of the turbines generate noise that has been reported to cause annoyance, sleep disturbance and consequently adverse health effects. Therefore, to ensure that residents living near wind farms are not subjected to excessive noise-related disturbance, it is important to identify potentially disturbing wind farm noise components. Moreover, suitable methods for quantifying these components are required. Acceptable threshold levels also need to be defined to determine the prevalence of potential noise disturbance.

Advances in Engineering Feature : Optimal Energy Management Amid Uncertain Supply and Demand

Fossil fuels continue to account for eighty-five per cent of the world's energy consumption. The need for renewable energy resources is unequivocal. As a result, we have recently witnessed an increase in renewable energy penetration, amounting to 27% of global electricity generation in 2019. However, the ability of the existing electric grid to support renewable energy penetration is limited as the infrastructure was designed to support unidirectional power-flows emanating from a few generating sources to a large number of consumers. Consequently, power-flows from distributed renewable energy sources pose grid stability challenges. In addition, growing concerns regarding efficiency, reliability, and security necessitate the transformation of the present grid into a "smart grid".

Advances in Engineering Feature: Recovery of Micronutrients and Heavy Metals from Digestate

The core goals of strategic environmental policies are to significantly reduce the use of fossil fuels and the emission of greenhouse gases through development of renewable energy technologies. The agricultural sector, for example, is among the fields that have witnessed tremendous growth of innovative technologies for the recovery of valuable resources such as energy, metals, and nutrients from bio-wastes and wastewaters. Unfortunately, several minerals and natural resources have been observed to deteriorate at an alarming rate. This calls for an urgent resolution to avoid future food unrest and distribution interruptions considering the critical role played by the macronutrients and micronutrients in ensuring socio-economic stability.

Advances in Engineering Feature: Are Carbon Nanotubes Stable Enough for Use in Sensors?

A plethora of literature exist that offer plausible information regarding the exceptional performance of sensors based on carbon nanotubes (CNT) transistors, with promises of transformative impact. Indeed, CNT-based biosensors have received immense attention over the decades, following which numerous demonstrations of sensors that make use of nanotubes as the semiconducting channel in a carbon nanotube field-effect transistor (CNTFET) have been exhibited.