extended analysis
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2021 ◽  
Author(s):  
Muhammad Tayab ◽  
Aaesha Hashem ◽  
Shaikha Al Hamoudi ◽  
Farrukh Qureshi ◽  
Safdar Khan

Abstract Over the last decade, Oil & Gas operations have come under tremendous pressures due to increasing production demands and venturing into harsher environmental conditions, increasing the health risks to crew with underlying medical conditions. Although there are strict medical fitness, requirements in place to reduce the vulnerability of crewmembers, increasing number Non Accidental Deaths (NAD) have challenged the Oil & Gas operations. NAD risks are often linked with medical assessment/fitness to work, training and medical emergency response, NAD questions the adequacy of management controls at work locations, especially in remote locations. ADNOC Group Companies adopt very HSE high standards to protect the workers, environment and assets; however, the risks of aggravating underlying medical conditions, illnesses or disorders often materialize and result in NADs. An extended analysis of over historical NAD events was performed and strengths of NAD barriers (Tayab et al, 2012) was assessed. Based on the review NAD Barriers were further redefined as follow:Adequacy of pre-employment medical assessmentAlert of underlying medical conditionsFollow up on chronic medical conditionsAlert for abnormal behavioursAwareness & Training It was found that over 70% of NAD cases were triggered due to aggravation of chronic illnesses, approximately 50 % of NAD cases were triggered during the first year of employment, 77% of NAD cases were due to cardiovascular illnesses and 18% were due to suicides and 13% were attributed to COVID & other factors. Additional NAD barriers were identified to update the barrier analysis as follows:Alert for abnormal behaviorReadiness to manage Medical EmergenciesWelfare & Counselling


Author(s):  
Xiao-Shan Yang ◽  
Xiao-Xue Zheng ◽  
Tian-Yu Zhang ◽  
Ying Du ◽  
Fengru Long

With the accelerated iteration of global electronic and electrical product updates, the demand for electronic and electrical products presents a new trend in which the life cycle of electronic and electrical products is shortened. Waste electrical and electronic equipment (WEEE) products pose a great threat to the global ecological environment, and solving this problem is urgent. Therefore, governments around the world have formulated funding policies for WEEE products, which has led to continuous improvements in such policies. Along these lines, we adopt the circular economy concept, extended producer responsibility theory and life cycle assessment method to comparatively analyse and compare the different fund operation modes in China, Germany, Japan and The Netherlands. In addition, based on the data related to fund policy implementation, we point out the problems in the development of the WEEE industry in China. The analysis results show that although China is the largest WEEE market, it is still in the initial stage and lags behind Western countries in efficiency and cost management. Then, taking as an example ‘Go Green’, an O2O classified recycling platform launched in 2005, this paper performs an extended analysis of the “Internet +” recycling model, which was proposed as a WEEE fund operation solution in China. Finally, we discuss the economic impact of this study on the future implementation and valuation of WEEE fund policy.


2021 ◽  
Author(s):  
◽  
Harvey Thomas Luke

<p>The South Pacific Convergence Zone (SPCZ) is the largest rainfall feature in the Southern Hemisphere, and is a critical component of the climate of Southwest Pacific Island nations. The small size and isolated nature of these islands leaves them vulnerable to short and long term changes in the position of the SPCZ. Its location and strength is strongly modulated by the El Niño-Southern Oscillation (ENSO) cycle and the Inter-decadal Pacific Oscillation (IPO), leading to large inter-annual and decadal variability in rainfall across the Southwest Pacific. Much of the analysis on the SPCZ has been restricted to the modern period, more specifically the “satellite era”, starting in 1979. Here, the representation of the SPCZ in the Twentieth Century Reanalysis (20CR) product, which reconstructs the three-dimensional state of the atmosphere based only on surface observations is discussed. The performance of two versions of the 20CR (versions 2 and 2c) in the satellite era is tested via inter-comparison with other reanalysis and observational satellite products, before using 20CR version 2c (20CRv2c) to perform extended analysis back to the early twentieth century. This study demonstrates that 20CR performs well in the satellite era, and is considered suitable for extended analysis. It is established that extra data added in the SPCZ region between 20CR versions 2 and 2c has improved the representation of the SPCZ during 1908-1958. Well-established relationships between ENSO and the IPO with the SPCZ are shown to be present through the entire 1908-2011 period, although it is suggested that the physical link between the IPO and the SPCZ has changed between the first and second half of the twentieth century. Finally, evidence of a southward trend of the SPCZ over the past century is presented, potentially due to an expansion of the tropics as a result of climate change.</p>


2021 ◽  
Author(s):  
◽  
Harvey Thomas Luke

<p>The South Pacific Convergence Zone (SPCZ) is the largest rainfall feature in the Southern Hemisphere, and is a critical component of the climate of Southwest Pacific Island nations. The small size and isolated nature of these islands leaves them vulnerable to short and long term changes in the position of the SPCZ. Its location and strength is strongly modulated by the El Niño-Southern Oscillation (ENSO) cycle and the Inter-decadal Pacific Oscillation (IPO), leading to large inter-annual and decadal variability in rainfall across the Southwest Pacific. Much of the analysis on the SPCZ has been restricted to the modern period, more specifically the “satellite era”, starting in 1979. Here, the representation of the SPCZ in the Twentieth Century Reanalysis (20CR) product, which reconstructs the three-dimensional state of the atmosphere based only on surface observations is discussed. The performance of two versions of the 20CR (versions 2 and 2c) in the satellite era is tested via inter-comparison with other reanalysis and observational satellite products, before using 20CR version 2c (20CRv2c) to perform extended analysis back to the early twentieth century. This study demonstrates that 20CR performs well in the satellite era, and is considered suitable for extended analysis. It is established that extra data added in the SPCZ region between 20CR versions 2 and 2c has improved the representation of the SPCZ during 1908-1958. Well-established relationships between ENSO and the IPO with the SPCZ are shown to be present through the entire 1908-2011 period, although it is suggested that the physical link between the IPO and the SPCZ has changed between the first and second half of the twentieth century. Finally, evidence of a southward trend of the SPCZ over the past century is presented, potentially due to an expansion of the tropics as a result of climate change.</p>


Conservation ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 342-349
Author(s):  
Daniel P. Faith

The term “biodiversity” generally refers to living variation. Biodiversity has recognized anthropocentric values of insurance and investment. Values of “nature” include those of biodiversity and also many other aspects reflecting the scope of human-nature relationships. Systematic conservation planning methods can integrate this range of local to global values. Early case studies in Australia and Papua New Guinea show the potential for such approaches. Recently, there have been calls for a recasting of the concept of biodiversity to capture plurality of values. However, balance among sometimes conflicting values of nature is best-served by a singular biodiversity concept and definition focused on variety, because this enables effective integration with other values of nature. Attempts at pluralistic recastings of biodiversity in fact may promote neglect of global biodiversity values. Further, an extended analysis of the Papua New Guinea case study shows that it cannot be argued that focusing on localized values of nature for conservation will effectively address regional/global scale conservation needs.


Author(s):  
Henrique Raduenz ◽  
Liselott Ericson ◽  
Kim Heybroek ◽  
Victor J. De. Negri ◽  
Petter Krus

This paper outlines an extended analysis on how multi-chamber actuators can improve the efficiency of valve-controlled systems. Resistive control is a major source of energy losses in valve-controlled systems that share the same pump to drive multiple loads. By combining different chambers, the load on multi-chamber actuators can be transformed into different pressure and flow rate levels. This allows the adaptation of its load to the loads on other actuators. This can lead to a reduction of resistive control energy losses that occur between pump and actuators when driven simultaneously. As a case study to highlight how the system efficiency can be improved, a load sensing system with a conventional and a multi-chamber actuator is analysed. The equations that describe the system steady state behaviour are presented to evaluate the effect of the load transformations on the system efficiency. A disadvantage of such architecture is the fact that load transformations result in different actuator speeds. To reduce this effect, a compensation factor for the command signal to the proportional valve is presented. The highlight from this paper is the potential for efficiency improvement enabled by the adoption of multi-chamber actuators in a valve-controlled architecture. Further research is required for the selection of number of chambers and their areas since they directly affect the system efficiency.


Author(s):  
Paul Oldfield

Historiographical production within twelfth-century Puglia seems to have been markedly limited, and this frustrates attempts to access internal perspectives on a region which played a pivotal socio-political and economic role within southern Italy as it fell under Norman rule, and was subsequently absorbed into the new Kingdom of Sicily in 1130. It might, however, be possible to bolster the region's twelfth-century historiographical outputs if we were to include a largely overlooked and problematic source, the so-called Fragmentary Troia Chronicle. It is a short, hybridized and fragmented Latin text usually assumed to be late twelfth-century as a result of its chronological coverage. It consists of an annalistic-style account of political and religious events mostly of relevance to the northern Pugliese city of Troia and its bishopric, and ostensibly covers 1014 to 1124/7. It is accompanied by what also seems to be an appendix of documents (some dated later than the annalistic section) associated with the city's bishopric. This article therefore offers the first extended analysis of the Troia Chronicle's place within Pugliese historiographical production. It revisits questions around its authenticity, examines potential contexts surrounding its production and content, and provides the first English translation of the narrative section of the chronicle. In so doing, it argues that we must tread carefully when using this source, but that the Troia Chronicle's existence and its main chronological focus could at the very least hold significance as a marker of an enduring remembrance of a vibrant era of episcopal, literary and urban development in this Pugliese city in the eleventh and twelfth centuries.


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