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Practical Streamline Method for Quantitatively Characterizing Waterflooding in Narrow Channel Reservoirs.
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State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China.
In waterflooding development of narrow channel reservoirs, the water cut rises quickly, and the reservoir becomes nearly fully flooded, yet oil recovery remains low. The narrow strip sand body and long-term water injection create a complex oil and water distribution, making it difficult to evaluate the degree of reservoir utilization during waterflooding. This paper establishes a practical streamline method to quantitatively characterize the waterflooding mobilization degree of narrow channel reservoirs.
View Article and Find Full Text PDFLecturers' teaching competencies towards improving teaching and learning process in universities in Tanzania: Students' perspectives.
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January 2025
The University of Dodoma-Tanzania, College of Education, Department of Educational Psychology and Curriculum Studies, P.O. Box 523, Dodoma, Tanzania.
This study examined lecturers' teaching competencies at universities in the attempt to improve the teaching and learning process by considering students' perspectives. Specifically, the study examined indicators of lecturers' teaching competencies in universities as well as establishing whether there is a relationship between students' perceived lecturers' teaching competencies and students' demographic parameters. The study used a cross-sectional survey design to generate data from 422 undergraduate students from three public universities in Tanzania using a questionnaire.
View Article and Find Full Text PDFApplication of Biochar-Immobilized for Enhancing Phosphorus Uptake and Growth in Rice.
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State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
Phosphorus (P) is an essential nutrient for rice growth, and the presence of phosphate-solubilizing bacteria (PSB) is an effective means to increase soil P content. However, the direct application of PSB may have minimal significance due to their low survival in soil. Biochar serves as a carrier that enhances microbial survival, and its porous structure and surface characteristics ensure the adsorption of .
View Article and Find Full Text PDFAdvancing Sustainable HIV Services Through Integration in Primary Healthcare in Sub-Saharan Africa: A Perspective on Practical Recommendations.
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Rwanda Biomedical Center, Kigali P.O. Box 7162, Rwanda.
Sub-Saharan Africa continues to bear a disproportionate burden of the global HIV epidemic. Integrating HIV services into primary healthcare is a crucial strategy to accelerate progress towards ending the epidemic. However, several challenges hinder effective integration, including underfunding, human resource shortages, infrastructure limitations, weak health systems, and sociocultural factors.
View Article and Find Full Text PDFA dynamic optimization of soil phosphorus status approach could reduce phosphorus fertilizer use by half in China.
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State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, 100193, Beijing, PR China.
Sustainable phosphorus (P) management is essential for ensuring crop production while avoiding environmental damage and the depletion of phosphate rock reserves. Despite local demonstration scale successes, the widespread mobilization of smallholder farmers to adopt sustainable management practices remains a challenge, primarily due to the associated high costs and complicated sampling. Here, we propose a dynamic optimization of soil P status (DOP) approach aimed at managing long-term soil P status within the range of agronomic and environmental soil P thresholds, which facilitates the precise determination of optimal P application rates without the need for frequent soil testing.
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