scholarly journals A Review of International Field Experience with Well Integrity at Carbon Utilization and Storage Sites

2020 ◽  
Author(s):  
Jaisree Iyer ◽  
Greg Lackey ◽  
Laura Edvardsen ◽  
Andrew Bean ◽  
Susan Carroll ◽  
...  
2022 ◽  
Vol 113 ◽  
pp. 103533
Author(s):  
Jaisree Iyer ◽  
Greg Lackey ◽  
Laura Edvardsen ◽  
Andrew Bean ◽  
Susan A. Carroll ◽  
...  

2017 ◽  
Vol 20 (2) ◽  
pp. 146-162 ◽  
Author(s):  
Samara Madrid Akpovo

This research examined the critical incidents of 10 United States (US) early childhood student teachers during a three-week university-sponsored international field experience conducted in three urban preschools in Kathmandu, Nepal. The purpose of employing the critical incident technique was to allow the US student teachers to reflect critically on successful and unsuccessful intercultural interactions in an effort to identify cultural assumptions about teaching young children. The approach was used not only to make assumptions visible, but also to make conceptual and behavioral changes based on what was learned from the critical reflection. The student teachers wrote weekly critical incidents, which were then discussed during weekly individual interviews. Three group discussions, a research journal, and field notes were used to triangulate the findings. A qualitative thematic analysis revealed five types of written critical incidents: descriptive, hypothetical, resistive, reflective, and integrative. Illustrative critical incidents are presented to compare and contrast how the international field experience allowed for productive reflection of cultural assumptions for some student teachers while leading to resistance to cultural assumptions for other student teachers. The findings suggest that outcomes vary based on the student teachers’ ability not only to identify their cultural assumptions, but also to challenge their cultural assumptions with actions grounded in ethnorelative reflection when teaching diverse groups of young children in the US and abroad.


1999 ◽  
Vol 77 (2) ◽  
pp. 312-317
Author(s):  
C Wu ◽  
T Hsiang

The mycelial growth, sclerotial production, and carbon utilization of the snow mould biocontrol agent Typhula phacorrhiza Fries were compared with the two grey snow mould fungi, Typhula ishikariensis Imai and Typhula incarnata Lasch ex Fries. Variation was observed among the four isolates for each species, but there was greater variation among species. All three species were able to grow at the lowest temperature (0°C), but temperature optima differed with T. ishikariensis lowest and T. phacorrhiza highest. On potato dextrose agar or potato malt agar at 10°C, T. phacorrhiza had greater radial growth than T. ishikariensis but less than T. incarnata. All species could utilize microcrystalline cellulose, bacto-cellulose, and glucose as carbon sources, but radial growth of T. phacorrhiza was significantly greater than T. incarnata and T. ishikariensis on these defined carbon sources tested, except for Indulin-AT, which was inhibitory to T. incarnata and T. phacorrhiza. This greater ability to utilize these structural and storage carbohydrates, combined with mycelial growth and sclerotial production over a wider range of temperatures, may help explain how some isolates of T. phacorrhiza are able to outcompete grey snow mould in field tests.Key words: turfgrass disease, biocontrol, psychrophilic.


2017 ◽  
Author(s):  
Alan Pitts ◽  
◽  
Giuseppina Kysar-Mattietti ◽  
Randolph A. McBride ◽  
Claudio Di Celma ◽  
...  

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 828 ◽  
Author(s):  
Weiwei Zhang ◽  
Linlin Liu

Carbon capture, utilization, and storage (CCUS) is one of the most effective technologies to reduce CO2 emissions and has attracted wide attention all over the world. This paper proposes a real option model to analyze the investment decisions of a coal-fired power plant on CCUS technologies under imperfect carbon emission trading schemes in China. Considering multiple uncertainties, which include carbon trading price volatility, carbon utilization revenue fluctuation, and changes in carbon transport and storage cost, the least squares Monte Carlo simulation method is used to solve the problems of path dependence. The research results show that the independent effects of carbon trading mechanisms on investment stimulation and emission reduction are limited. The utilization ratio of captured CO2 has significant impacts on the net present value and investment value of the CCUS project. Moreover, the investment threshold is highly sensitive to the utilization proportion of food grade CO2 with high purity. It is suggested that the Chinese government should take diverse measures simultaneously, including increasing grants for research and development of carbon utilization technologies, introducing policies to motivate investments in CCUS projects, and also improving the carbon emission trading scheme, to ensure the achievement of the carbon emission reduction target in China.


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