Investigating the causal factors of electric line worker incidents is of high priority due to the decades-long record of incidents in the electric power industry. According to Bureau of Labor Statistics (BLS, 2018), 152 electrical line installer fatalities occurred in the U.S. in 2011 through 2016. For the individual years, the fatality numbers were 26, 27, 27, 25, 26 and 21, respectively. These rates often account for the ranking of electric line installers among the most dangerous professions in the U.S. Major contributors to electric line work incidents include electrocutions, machines, tools and vehicles (BLS, 2018). Closer inspection of these contributors reveals that their antecedents consist of attentional, strategic or knowledge factors (Reason, 1997). The study presented in this article investigates the role of sustained attention as a primary contributor to electric line worker incidents.
Little research exists concerning the safety of electric power line installers and, to the authors’ knowledge, no research is available regarding attentiveness as a causal factor of installer incidents. Specifically, the effect of sustained attention and vigilance (cognitive skills of immediate relevance to incident prevention for these workers) has not been examined. Past studies of cognitive-training regimens have evaluated both the effect on the trained task and transfer of training benefit to related but untrained cognitive tasks.
Tokyo Gas received its first cargo produced at Dominion’s Cove Point LNG terminal in May 2018 via the LNG Sakura. Japan is bringing its nuclear reactors back on line following the suspension of operations at all reactors after the 2011 Fukushima accident. As the reactors return to full operation, the increase in nuclear generation is likely to displace generation from fossil sources, in particular natural gas. Because Japan imports all of its natural gas in the form of LNG, increased nuclear power production is likely to reduce Japanese imports of LNG in the electric power sector by as much as 10% in 2019. Japan suspended operations at all nuclear reactors for mandatory safety inspections and upgrades, leaving the country with no nuclear generation from September 2013 to August 2015.
Chen, Yung-Wei (National Taiwan Ocean University) | Shih, Chao-Feng (National Taiwan Ocean University) | Liu, Yu-Chen (National Taiwan Ocean University) | Soon, Shih-Ping (National Taiwan Ocean University)
This paper presents an equal-norm multiple-scale Trefftz method (MSTM) associated with the group-preserving schemes (GPS) to tackle some difficulties in nonlinear sloshing behaviors. The MSTM combined with the vector regularization method is first adopted to eliminate the higher-order numerical oscillation phenomena and noisy dissipation in the boundary value problem. Then, the weighting factors of initial and boundary value problems are introduced into the linear system to prevent the elevation from vanishing without iterative computational controlled volume. More important, the explicit scheme, based on the GL (n, R), and the implicit scheme can be combined to reduce iteration number and increase computational efficiency. A comparison of the results shows that the proposed approach is better than previously reported methods.
Sloshing of liquid in tanks has received considerable attention from many researchers in related engineering fields. The problem arises because excessive sloshing of the confined liquid can strongly damage the structure or the loads induced by sloshing, which may seriously modify the dynamics of the vehicle that supports the tanks—for example, fuel sloshing in liquid propellant launch vehicles (Lu et al., 2015), oil oscillations in large storage tanks as a result of long-period strong ground motions (Hashimoto et al., 2017), and sloshing in nuclear fuel pools owing to earthquakes (Eswaran and Reddy, 2016). Besides, sloshing effects in the ballast tanks of a ship may cause it to experience large rolling moments and eventually capsize because of loss of dynamic stability (Krata, 2013; Sanapala et al., 2018). Also, if the forcing frequency coincides with the natural sloshing frequency, the high dynamic pressures, by reason of resonance, may damage the tank walls. Thus, accurate prediction of sloshing behaviors in tanks driven by external forces is very critical for successful structural design and reducing impacts on vehicle maneuvering.
Expected to begin production in 2022, Gimi will liquefy gas as part of the first phase of the project. It is designed to produce an average of approximately 2.5 mtpa of LNG using Black and Veatch’s PRICO liquefaction process. Keppel will fabricate the vessel at its shipyard in Singapore. Hilli Episeyo has maintained 100% uptime since beginning commercial operations offshore Cameroon in June 2018. The total gas resources in the field are estimated to be around 15 Tcf.
In the past 3 months, Poland (PGNiG) has signed three long-term contracts for LNG deliveries with the US firms Venture Global, Cheniere, and Sempra. A planned expansion project will increase this to 7.5 Bcm per year in 2021. The terminal is one of Europe’s busiest, operating at more than 60% of its capacity. In 2022, Poland’s long-term contract with Gazprom is set to expire, and the terminal could be responsible for processing more than 30% of the country’s total gas consumption. Poland is also planning to complete the Baltic Pipe project by the end of 2022, the gas pipeline that will deliver up to 10 Bcm of gas yearly from Norway.
Anadarko announced a pair of sign and purchase agreements (SPA) on the Mozambique LNG project that is gradually moving toward sanction. Mozambique LNG1, the sales entity jointly owned by Anadarko and other co-venturers in Mozambique Offshore Area 1, signed SPAs with Shell and Tokyo Gas and Centrica. Shell’s deal will call for 2 mtpa over a 13-year period, while the Tokyo Gas deal calls for 2.6 mtpa from production startup until the early 2040s. Anadarko is developing Mozambique’s first onshore LNG plant, which will consist of two initial LNG trains with a total nameplate capacity of 12.88 mtpa, to support the development of the Golfinho/Atum field located entirely within Offshore Area 1. The Tokyo deal is the second supply deal announced with a major Asian buyer in the last week.
Co-owned by Qatar Petroleum, Exxon Mobil, and ConocoPhillips, the Golden Pass LNG Terminal handles up to 2 Bcf/D of natural gass imports. Qatar Petroleum and Exxon Mobil Corp. will soon announce plans to proceed with a $10-billion project to expand the Golden Pass LNG terminal in Texas, according to a Reuters report released 1 February. The report cited three people familiar with the transaction. ConocoPhillips, the third partner in the terminal, will sell its 12.4% stake in the project and has no plans to participate in the expansion. Exxon Mobil is the most likely buyer for that stake; sources told Reuters that the plans for the project are in advanced stages and the existing partners do not want to bring in another company.
Demand for LNG has increased in recent years, as it has become increasingly available, affordable, and more environmentally sustainable than coal and crude oil. While Asian markets have become key importers of LNG, piping LNG to many countries in East Asia has presented great difficulties that have required, instead, transport by sea. The story of LNG transport is explained against the backdrop of geopolitical tensions and diplomatic relations. Finally, the paper evaluates countries that may soon come online as global suppliers of LNG, and assesses the political implications of countries in Africa, as well as Canada and Israel, joining the ranks of exporters of natural gas. Latest federal approval authorizes US LNG exports to non-FTA countries.
LNG carrier Vladimir Rusanov conducted its first loading operation in the Yamal LNG plant at Sabetta, Russia, in March 2018. Before that could occur, the vessel left the Daewoo Shipbuilding & Marine Engineering Co. Okpo yard to head to the Arctic Ocean through the Suez Canal for ice trials. Over 3 weeks, she demonstrated her capabilities before being handed over to the Yamal LNG project. Vladimir Rusanov’s first cargo arrived at the Bering Strait on 6 July, completing an 11-day voyage along the Northern Sea Route from the Yamal plant at Sabetta. It was bound for Jiangsu Rudong port to the north of Shanghai.