Environmental and Economic Impacts of Biofouling on Marine and Coastal Heat Exchangers

Biofouling is a major problem that affects the heat transfer efficiency of marine and coastal heat exchangers. The reduced heat exchanger efficiency results in energy loss and thereby affects the overall energy efficiency in the marine industry segment. Additional energy is required to compensate for the energy loss leading to increased fuel consumption which in turn contributes to global environmental issues like climate change. The current industrial methods of biofouling mitigation or removal from heat exchanger surfaces increase both operational and maintenance expenditure causing further environmental damages. This paper presents two models to provide an overview of the major environmental and economic impacts due to biofouling in marine heat exchangers. The study results suggest the need for sustainable biofouling prevention techniques to improve the energy and resource efficiency of marine heat exchangers

Educational Needs and Barriers for Refugee Students in the United States: A Review of the Literature

Since 1975, the United States has resettled more than 2 million refugees, with approximately half arriving as children. Refugee children have traumatic experiences that can hinder their learning. The United Nations has specified in conventions, and researchers have concurred, that education is essential for refugee children’s psychosocial adjustment. However, government officials, public opinion, and researchers have often differed about what is best for refugees’ healthy acculturation. On the basis of a large-scale longitudinal study of the children of immigrants and refugees, Portes and Zhou (1993) suggested the theory of segmented assimilation, which accounts for diverse entry situations and receptions of immigrant and refugee populations. This review uses their theory to consider the needs and obstacles to education for refugees, and interventions for success